diff --git a/src/client/models/site/craft_page.coffee b/src/client/models/site/craft_page.coffee
index 4f2325d41..087b98f0d 100644
--- a/src/client/models/site/craft_page.coffee
+++ b/src/client/models/site/craft_page.coffee
@@ -5,45 +5,89 @@
 # All rights reserved.
 #
 
-CraftingGuideCommon = require "crafting-guide-common"
-
-{BaseModel} = CraftingGuideCommon.deprecated
-{Craftsman} = CraftingGuideCommon.deprecated.crafting
-{Inventory} = CraftingGuideCommon.deprecated.game
-{ModPack}   = CraftingGuideCommon.deprecated.game
+{Inventory} = require("crafting-guide-common").models
+{Observable} = require("crafting-guide-common").util
+{PlanBuilder} = require("crafting-guide-common").crafting
+{ResourcesEvaluator} = require("crafting-guide-common").crafting
+{StepsEvaluator} = require("crafting-guide-common").crafting
 
 ########################################################################################################################
 
-module.exports = class CraftPage extends BaseModel
+module.exports = class CraftPage extends Observable
 
-    constructor: (attributes={}, options={})->
-        if not attributes.modPack then throw new Error 'attributes.modPack is required'
-        attributes.params    ?= null
-        attributes.craftsman ?= new Craftsman attributes.modPack
-        super attributes, options
+    constructor: (attributes={})->
+        super
 
-        @modPack.on c.event.change, => @_consumeParams()
-        @on c.event.change + ':params', => @_consumeParams()
-        @craftsman.on c.event.change + ':stage', => @trigger c.event.change, this
-        @craftsman.on c.event.change + ':complete', => @trigger c.event.change, this
+        @muted -> @modPack = attributes.modPack
+
+        @_currentPlan = null
+        @_have        = new Inventory
+        @_planBuilder = new PlanBuilder new StepsEvaluator
+        @_want        = new Inventory
+
+        @_consumeParams attributes.params
+
+        @_have.on Observable::ANY, this, "_onHaveChanged"
+        @_want.on Observable::ANY, this, "_onWantChanged"
+
+    # Properties ###################################################################################
+
+    Object.defineProperties @prototype,
+
+        currentPlan:
+            get: -> return @_currentPlan
+            set: -> throw new Error "currentPlan cannot be assigned"
+
+        have:
+            get: -> return @_have
+            set: -> throw new "have cannot be assigned"
+
+        isDirty:
+            get: -> return @_isDirty
+            set: -> throw new Error "isDirty cannot be assigned"
+
+        isOutdated:
+            get: -> return @currentPlan? and @isDirty
+            set: -> throw new Error "isOutdated cannot be assigned"
+
+        modPack:
+            get: -> return @_modPack
+            set: (modPack)->
+                if @_modPack? then throw new Error "modPack cannot be reassigned"
+                if not modPack? then throw new Error "modPack is required"
+                @_modPack = modPack
+
+        planBuilder:
+            get: -> return @_planBuilder
+            set: -> throw new Error "planBuilder cannot be assigned"
+
+        want:
+            get: -> return @_want
+            set: -> throw new Error "want cannot be assigned"
+
+    # Public Methods ###############################################################################
+
+    createPlan: ->
+        newPlan = @_planBuilder.createPlan @_want, @_have
+        @triggerPropertyChange "currentPlan", @_currentPlan, newPlan, ->
+            @_currentPlan = newPlan
+            @triggerPropertyChange "isDirty", @_isDirty, false
 
     # Private Methods ##############################################################################
 
-    _consumeParams: ->
-        return unless @params?
+    _consumeParams: (params)->
+        return unless params?.inventoryText?
 
-        @craftsman.want.clear()
-        if not @params.inventoryText?
-            @params = null
-        else
-            inventory = new Inventory
-            inventory.parse @params.inventoryText
+        newWant = Inventory.fromUrlString params.inventoryText, @modPack
+        @_want.clear()
 
-            inventory.each (stack)=>
-                item = @modPack.findItem stack.itemSlug, enableAsNeeded:true
-                return unless item? and item.isCraftable
+        for itemId, stack of newWant.stacks
+            continue unless stack.item.isCraftable
+            @_want.add stack.item, stack.quantity
 
-                @craftsman.want.add stack.itemSlug, stack.quantity
-                inventory.remove stack.itemSlug
+    _onHaveChanged: ->
+        @triggerPropertyChange "isDirty", @_isDirty, true
 
-            if inventory.isEmpty then @params = null
+    _onWantChanged: ->
+        @triggerPropertyChange "isDirty", @_isDirty, true, ->
+            if @want.isEmpty then @triggerPropertyChange "currentPlan", @_currentPlan, null
diff --git a/src/client/models/site/item_display.coffee b/src/client/models/site/item_display.coffee
index a42b12cb6..ac789c463 100644
--- a/src/client/models/site/item_display.coffee
+++ b/src/client/models/site/item_display.coffee
@@ -37,6 +37,10 @@ module.exports = class ItemDisplay
                 if not item? then throw new Error "item is required"
                 @_item = item
 
+        mod:
+            get: -> return @_item.mod
+            set: -> throw new Error "mod cannot be assigned"
+
         modUrl:
             get: -> return c.url.mod modId:@item.mod.id
             set: -> throw new Error "modUrl cannot be assigned"
diff --git a/src/client/models/site/item_page.coffee b/src/client/models/site/item_page.coffee
index 92b1388cf..f7caffe7e 100644
--- a/src/client/models/site/item_page.coffee
+++ b/src/client/models/site/item_page.coffee
@@ -6,7 +6,7 @@
 #
 
 {Item}       = require("crafting-guide-common").models
-ItemDisplay  = require "../item_display"
+ItemDisplay  = require "./item_display"
 {Observable} = require("crafting-guide-common").util
 
 ########################################################################################################################
diff --git a/src/client/models/site/item_selector.coffee b/src/client/models/site/item_selector.coffee
index 2c4f8beb9..00c07a1a2 100644
--- a/src/client/models/site/item_selector.coffee
+++ b/src/client/models/site/item_selector.coffee
@@ -5,52 +5,49 @@
 # All rights reserved.
 #
 
-{BaseModel} = require('crafting-guide-common').deprecated
-{ItemSlug}  = require('crafting-guide-common').deprecated.game
+{Observable} = require("crafting-guide-common").util
 
 ########################################################################################################################
 
-module.exports = class ItemSelector extends BaseModel
+module.exports = class ItemSelector extends Observable
 
-    constructor: (attributes={}, options={})->
-        if not options.modPack? then throw new Error 'options.modPack is required'
-        options.isAcceptable ?= (item)-> return true # accept everything by default
-        super attributes, options
+    constructor: (modPack, options={})->
+        super
 
-        @_isAcceptable  = options.isAcceptable
+        @_isAcceptable  = options.isAcceptable or (item)-> return true # accept everything by default
         @_maxResults    = 100
         @_minHintLength = 3
-        @_modPack       = options.modPack
         @_results       = []
 
+        @modPack = modPack
+
     # Property Methods #############################################################################
 
     Object.defineProperties @prototype,
 
         hint:
-            get: ->
-                return @_hint
+            get: -> return @_hint
+            set: (hint)->
+                @triggerPropertyChange "hint", @_hint, hint, ->
+                    @_hint = hint?.toLowerCase()
+                    @_refreshResults()
 
-            set: (newHint)->
-                oldHint = @_hint
-                return if newHint is oldHint
-
-                @_hint = newHint.toLowerCase()
-
-                @trigger c.event.change + ':hint', this, oldHint, newHint
-                @_refreshResults()
-                @trigger c.event.change, this
+        modPack:
+            get: -> return @_modPack
+            set: (modPack)->
+                if not modPack? then throw new Error "modPack is required"
+                if @_modPack? then throw new Error "modPack cannot be reassigned"
+                @_modPack = modPack
 
         results:
-            get: ->
-                return @_results
+            get: -> return @_results
 
     # Private Methods ##############################################################################
 
-    _computeScore: (name, itemSlug)->
+    _computeScore: (item)->
         hintIndex  = 0
         hintLetter = @_hint[hintIndex]
-        name       = name.toLowerCase()
+        name       = item.displayName.toLowerCase()
         nextScore  = 1
         totalScore = 0
 
@@ -60,8 +57,6 @@ module.exports = class ItemSelector extends BaseModel
                 nextScore += 1
                 hintIndex += 1
                 if hintIndex is @_hint.length
-                    item = @_modPack.findItem itemSlug
-                    return 0 unless item?
                     return 0 unless @_isAcceptable item
                     break
 
@@ -75,29 +70,34 @@ module.exports = class ItemSelector extends BaseModel
         return totalScore
 
     _refreshResults: ->
-        oldResults = @_results
         scoredItems = []
         count = 0
 
-        logger.verbose => "Looking for items which match: #{@_hint}"
         if @_hint.length >= @_minHintLength
-            @_modPack.eachMod (mod)=>
+            for modId, mod of @_modPack.mods
                 return if count >= @_maxResults
-                return unless mod.enabled
+                return unless mod.isEnabled
 
-                mod.eachName (name, itemSlug)=>
+                for itemId, item of mod.items
                     return if scoredItems.length >= @_maxResults
-                    return unless itemSlug.isQualified
 
-                    score = @_computeScore name, itemSlug
+                    score = @_computeScore item
                     if score >= @_hint.length
-                        scoredItems.push score:score, itemSlug:itemSlug
+                        scoredItems.push score:score, item:item
 
         scoredItems.sort (a, b)->
             if a.score isnt b.score
                 return if a.score > b.score then -1 else +1
-            return ItemSlug.compare a.itemSlug, b.itemSlug
 
-        newResults = (e.itemSlug for e in scoredItems)
-        @_results = newResults
-        @trigger c.event.change + ':results', this, oldResults, newResults
+            nameA = a.item.displayName
+            nameB = b.item.displayName
+            if nameA.length isnt nameB.length
+                return if nameA.length < nameB.length then -1 else +1
+
+            if nameA isnt nameB
+                return if nameA < nameB then -1 else +1
+
+            return 0
+
+        @_results = (e.item for e in scoredItems)
+        @trigger c.event.change + ':results', this
diff --git a/src/client/site/base_controller.coffee b/src/client/site/base_controller.coffee
index c4fcff5ed..31b43ac61 100644
--- a/src/client/site/base_controller.coffee
+++ b/src/client/site/base_controller.coffee
@@ -112,7 +112,7 @@ module.exports = class BaseController extends Backbone.View
 
                 newModel = @onWillChangeModel @_model, newModel
                 @_model = newModel
-                @tryRefresh()
+                @onDidModelChange()
 
         rendered:
             get: -> @_rendered
@@ -149,6 +149,7 @@ module.exports = class BaseController extends Backbone.View
         @$el.data $renderedEl.data()
         @delegateEvents()
 
+        @$el.controller = this
         @_rendered = true
         @onDidRender()
 
diff --git a/src/client/site/common/crafting_grid/crafting_grid_controller.coffee b/src/client/site/common/crafting_grid/crafting_grid_controller.coffee
index ab87389b9..53a22709c 100644
--- a/src/client/site/common/crafting_grid/crafting_grid_controller.coffee
+++ b/src/client/site/common/crafting_grid/crafting_grid_controller.coffee
@@ -5,39 +5,47 @@
 # All rights reserved.
 #
 
-BaseController = require '../../base_controller'
-SlotController = require '../slot/slot_controller'
+BaseController = require "../../base_controller"
+{Recipe}       = require("crafting-guide-common").models
+SlotController = require "../slot/slot_controller"
 
 ########################################################################################################################
 
 module.exports = class CraftingGridController extends BaseController
 
     constructor: (options={})->
-        if not options.imageLoader? then throw new Error 'options.imageLoader is required'
-        if not options.modPack? then throw new Error 'options.modPack is required'
-        if not options.router? then throw new Error 'options.router is required'
-        # options.model should be a recipe
-        options.templateName = 'common/crafting_grid'
+        if not options.imageLoader? then throw new Error "options.imageLoader is required"
+        if not options.modPack? then throw new Error "options.modPack is required"
+        if not options.router? then throw new Error "options.router is required"
+        options.templateName = "common/crafting_grid"
         super options
 
         @_imageLoader = options.imageLoader
         @_modPack     = options.modPack
         @_router      = options.router
 
-        @_modPack.on c.event.change, => @tryRefresh()
-
     # BaseController Methods #######################################################################
 
+    onWillChangeModel: (oldModel, newModel)->
+        if newModel? and (newModel.constructor isnt Recipe) then throw new Error "options.model must be a Recipe"
+        super
+
     onDidRender: ->
         @_slotControllers = []
-        for el in @$('.view__slot')
+        for el in @$(".view__slot")
             controller = new SlotController el:el, imageLoader:@_imageLoader, modPack:@_modPack, router:@_router
             controller.render()
             @_slotControllers.push controller
         super
 
     refresh: ->
-        for controller, index in @_slotControllers
-            controller.model = @model?.getStackAtSlot(index)
+        index = 0
+        for y in [0..2]
+            for x in [0..2]
+                controller = @_slotControllers[index++]
+                if @model?
+                    controller.model = @model.getInputAt x, y
+                else
+                    controller.model = null
 
         super
diff --git a/src/client/site/common/inventory/inventory_controller.coffee b/src/client/site/common/inventory/inventory_controller.coffee
index 9e2e4fe11..315e87d43 100644
--- a/src/client/site/common/inventory/inventory_controller.coffee
+++ b/src/client/site/common/inventory/inventory_controller.coffee
@@ -47,8 +47,6 @@ module.exports = class InventoryController extends BaseController
 
         @_stackControllers = []
 
-        @listenTo @_modPack, c.event.change, => @tryRefresh()
-
     # Event Methods ################################################################################
 
     onClearButtonClicked: ->
@@ -61,31 +59,33 @@ module.exports = class InventoryController extends BaseController
         @trigger c.event.change, this
 
     onFirstButtonClicked: (stackController)->
-        tracker.trackEvent @_trackingContext, 'remove-from', "#{stackController?.model?.itemSlug}"
-        @trigger c.event.button.first, this, stackController?.model?.itemSlug
+        itemId = stackController.model?.item.id
+        tracker.trackEvent @_trackingContext, 'remove-from', itemId
+        @trigger c.event.button.first, this, itemId
 
     onItemSelectorButtonClicked: ->
         return unless @model?
 
         tracker.trackEvent @_trackingContext, 'launch-add-to'
         @_selector.launch()
-            .then (itemSlug)=>
-                if not itemSlug?
+            .then (item)=>
+                if not item?
                     tracker.trackEvent @_trackingContext, 'cancel-add-to'
                     return
 
-                tracker.trackEvent @_trackingContext, 'complete-add-to', "#{itemSlug}"
-                @model.add itemSlug, 1
-                @trigger c.event.add, this, itemSlug
+                tracker.trackEvent @_trackingContext, 'complete-add-to', "#{item.id}"
+                @model.add item, 1
+                @trigger c.event.add, this, item.id
                 @trigger c.event.change, this
 
     onSecondButtonClicked: (stackController)->
+        itemId = stackController.model?.item.id
         @trigger c.event.button.second, this, stackController?.model?.itemSlug
 
     # BaseController Overrides #####################################################################
 
     onDidRender: ->
-        @_selector = @addChild ItemSelectorController, null, isAcceptable: @_isAcceptable, modPack: @_modPack
+        @_selector = @addChild ItemSelectorController, null, isAcceptable:@_isAcceptable, modPack:@_modPack
 
         @$clearButton      = @$('.button.clear')
         @$emptyPlaceholder = @$('.empty_placeholder')
@@ -131,7 +131,7 @@ module.exports = class InventoryController extends BaseController
         index = 0
 
         if @model?
-            @model.each (stack)=>
+            for itemId, stack of @model.stacks
                 controller = @_stackControllers[index]
                 if not controller?
                     controller = new StackController
@@ -153,6 +153,7 @@ module.exports = class InventoryController extends BaseController
                     @$itemContainer.append controller.$el
                 else
                     controller.model = stack
+
                 index += 1
 
         while @_stackControllers.length > index
diff --git a/src/client/site/common/item_selector/element/element_controller.coffee b/src/client/site/common/item_selector/element/element_controller.coffee
index c1ccbe108..38dd56d6c 100644
--- a/src/client/site/common/item_selector/element/element_controller.coffee
+++ b/src/client/site/common/item_selector/element/element_controller.coffee
@@ -5,58 +5,63 @@
 # All rights reserved.
 #
 
-BaseController = require '../../../base_controller'
+BaseController = require "../../../base_controller"
+ItemDisplay    = require "../../../../models/site/item_display"
 
 ########################################################################################################################
 
 module.exports = class ElementController extends BaseController
 
     constructor: (options={})->
-        if not options.model? then throw new Error 'options.model is required'
-        options.onClicked ?= (controller)-> # do nothing
-        options.onSelected ?= (controller)-> # do nothing
-        options.templateName = 'common/item_selector/element'
+        if not options.model? then throw new Error "options.model is required"
+        options.templateName = "common/item_selector/element"
         options.useAnimations = false
         super options
 
-        @onClicked = options.onClicked
-        @onSelected = options.onSelected
+        @onClicked = options.onClicked or (controller)-> # do nothing
+        @onSelected = options.onSelected or (controller)-> # do nothing
 
     # Property Methods #############################################################################
 
-    isSelected: ->
-        return @_selected
-
-    setSelected: (newSelected)->
-        oldSelected = @_selected
-        return if newSelected is oldSelected
-
-        @_selected = newSelected
-        @tryRefresh()
-
-        @trigger c.event.change + ':selected', this, oldSelected, newSelected
-        @trigger c.event.change, this
-
     Object.defineProperties @prototype,
-        selected: {get:@prototype.isSelected, set:@prototype.setSelected}
+
+        display:
+            get: -> return @_display ?= new ItemDisplay @model
+            set: -> throw new Error "display cannot be assigned"
+
+        isSelected:
+            get: -> return @_selected
+            set: (newSelected)->
+                oldSelected = @_selected
+                return if newSelected is oldSelected
+
+                @_selected = newSelected
+                @tryRefresh()
+
+                @trigger c.event.change + ":selected", this, oldSelected, newSelected
+                @trigger c.event.change, this
 
     # BaseController Overrides #####################################################################
 
+    onDidModelChange: ->
+        @_display = null
+        super
+
     onDidRender: ->
-        @$icon = @$('img')
-        @$name = @$('.name')
-        @$modName = @$('.modName')
+        @$icon = @$("img")
+        @$name = @$(".name")
+        @$modName = @$(".modName")
         super
 
     refresh: ->
-        @$icon.attr 'src', @model.iconUrl
-        @$name.html @model.itemName
-        @$modName.html @model.modName
+        @$icon.attr "src", @display.iconUrl
+        @$name.html @model.displayName
+        @$modName.html @model.mod.displayName
 
         if @_selected
-            @$el.addClass 'selected'
+            @$el.addClass "selected"
         else
-            @$el.removeClass 'selected'
+            @$el.removeClass "selected"
 
         super
 
@@ -64,15 +69,15 @@ module.exports = class ElementController extends BaseController
 
     events: ->
         return _.extend super,
-            'click': '_onClick'
-            'mouseenter': '_onMouseEnter'
+            "click": "_onClick"
+            "mouseenter": "_onMouseEnter"
 
     # Private Methods ##############################################################################
 
     _onClick: (event)->
-        event.preventDefault()
         @onClicked this
+        return false
 
     _onMouseEnter: (event)->
-        event.preventDefault()
         @onSelected this
+        return false
diff --git a/src/client/site/common/item_selector/item_selector_controller.coffee b/src/client/site/common/item_selector/item_selector_controller.coffee
index 33c634a7a..25f70433d 100644
--- a/src/client/site/common/item_selector/item_selector_controller.coffee
+++ b/src/client/site/common/item_selector/item_selector_controller.coffee
@@ -5,21 +5,22 @@
 # All rights reserved.
 #
 
-BaseController    = require '../../base_controller'
-ItemSelector      = require '../../../models/site/item_selector'
-ElementController = require './element/element_controller'
+BaseController    = require "../../base_controller"
+ItemDisplay       = require "../../../models/site/item_display"
+ItemSelector      = require "../../../models/site/item_selector"
+ElementController = require "./element/element_controller"
 w                 = require "when"
 
 ########################################################################################################################
 
 module.exports = class ItemSelectorController extends BaseController
 
-    constructor: (options)->
-        if not options.modPack? then throw new Error 'options.modPack is required'
+    constructor: (options={})->
+        if not options.modPack? then throw new Error "options.modPack is required"
         options.isAcceptable ?= null
-        options.model        ?= new ItemSelector {}, modPack:options.modPack, isAcceptable:options.isAcceptable
+        options.model        ?= new ItemSelector options.modPack, isAcceptable:options.isAcceptable
         options.onChoseItem  ?= (item)-> # do nothing
-        options.templateName  = 'common/item_selector'
+        options.templateName  = "common/item_selector"
         super options
 
         @_modPack = options.modPack
@@ -29,25 +30,25 @@ module.exports = class ItemSelectorController extends BaseController
 
     # Public Methods ###############################################################################
 
-    launch: (hint='')->
+    launch: (hint="")->
         @model.hint = hint
         if @rendered then @refresh()
 
         @_disableWindowScrolling()
 
-        @$page.addClass 'blur'
+        @$page.addClass "blur"
         @$screen.append @$popup
-        @$screen.css 'display', ''
+        @$screen.css "display", ""
 
         @$popup.off c.event.click
         @$popup.on c.event.click, (event)=> @onPopupClicked(event)
 
-        @$hintField.off 'keyup input'
-        @$hintField.on 'keyup', (event)=> @onHintKeyPress(event)
-        @$hintField.on 'input', (event)=> @onHintChanged(event)
+        @$hintField.off "keyup input"
+        @$hintField.on "keyup", (event)=> @onHintKeyPress(event)
+        @$hintField.on "input", (event)=> @onHintChanged(event)
         @$hintField.focus()
 
-        @$closeButton.one 'click', (event)=> @_close()
+        @$closeButton.one "click", (event)=> @_close()
 
         @$screen.one c.event.click, (event)=> @onScreenClicked(event)
 
@@ -85,17 +86,17 @@ module.exports = class ItemSelectorController extends BaseController
         return false
 
     onResultClicked: (controller)->
-        @_session.resolve controller.model.slug
+        @_session.resolve controller.model
         @_session = null
         @_close()
         return false
 
     onResultSelected: (controller)->
         for c in @_elementControllers
-            c.selected = false
+            c.isSelected = false
 
         if controller?
-            controller.selected = true
+            controller.isSelected = true
 
         return false
 
@@ -106,14 +107,14 @@ module.exports = class ItemSelectorController extends BaseController
     # BaseController Overrides #####################################################################
 
     onDidRender: ->
-        @$page             = $('.page') # find the shared, global page
-        @$screen           = $('.view__screen') # find the shared, global screen
+        @$page             = $(".page") # find the shared, global page
+        @$screen           = $(".view__screen") # find the shared, global screen
 
-        @$closeButton      = @$('img.close')
-        @$popup            = @$('.view__item_selector_popup')
-        @$hintField        = @$('.view__item_selector_popup input')
-        @$searchInput      = @$('.search input')
-        @$resultsContainer = @$('.results')
+        @$closeButton      = @$("img.close")
+        @$popup            = @$(".view__item_selector_popup")
+        @$hintField        = @$(".view__item_selector_popup input")
+        @$searchInput      = @$(".search input")
+        @$resultsContainer = @$(".results")
 
         @$popup.detach()
         super
@@ -127,16 +128,16 @@ module.exports = class ItemSelectorController extends BaseController
 
     _chooseSelected: ->
         for controller in @_elementControllers
-            if controller.selected
+            if controller.isSelected
                 @onResultClicked controller
                 return
 
     _close: ->
         @_enableWindowScrolling()
-        @$page.removeClass 'blur'
-        @$screen.css 'display', 'none'
+        @$page.removeClass "blur"
+        @$screen.css "display", "none"
         @$popup.detach()
-        @model.hint = ''
+        @model.hint = ""
 
         if @_session
             @_session.resolve null
@@ -144,28 +145,27 @@ module.exports = class ItemSelectorController extends BaseController
 
     _disableWindowScrolling: ->
         @_windowScrollPosition = $(window).scrollTop()
-        $('body').addClass('scrollDisabled').css('margin-top', -@_windowScrollPosition)
+        $("body").addClass("scrollDisabled").css("margin-top", -@_windowScrollPosition)
 
     _enableWindowScrolling: ->
-        $('body').removeClass('scrollDisabled').css('margin-top', 0)
+        $("body").removeClass("scrollDisabled").css("margin-top", 0)
         $(window).scrollTop @_windowScrollPosition
 
     _refreshResults: ->
         index = 0
 
-        for itemSlug in @model.results
-            displayModel = @_modPack.findItemDisplay itemSlug
+        for item in @model.results
             controller = @_elementControllers[index]
             if not controller?
                 controller = new ElementController
-                    model:      displayModel
+                    model:      item
                     onClicked:  (c)=> @onResultClicked(c)
                     onSelected: (c)=> @onResultSelected(c)
                 controller.render show:false
                 @_elementControllers[index] = controller
                 @$resultsContainer.append controller.$el
             else
-                controller.model = displayModel
+                controller.model = item
 
             controller.show()
             index += 1
@@ -180,14 +180,17 @@ module.exports = class ItemSelectorController extends BaseController
             controller = @_elementControllers[i]
             nextController = @_elementControllers[i + 1]
 
-            if controller.selected
-                controller.selected = false
-                nextController.selected = true
+            if controller.isSelected
+                controller.isSelected = false
+                nextController.isSelected = true
                 @_showElement nextController.$el
                 return
 
+        [..., controller] = @_elementControllers
+        controller.isSelected = false
+
         controller = @_elementControllers[0]
-        controller.selected = true
+        controller.isSelected = true
         @_showElement controller.$el
 
     _selectPrevious: ->
@@ -197,14 +200,17 @@ module.exports = class ItemSelectorController extends BaseController
             previousController = @_elementControllers[i - 1]
             controller = @_elementControllers[i]
 
-            if controller.selected
-                previousController.selected = true
-                controller.selected = false
+            if controller.isSelected
+                previousController.isSelected = true
+                controller.isSelected = false
                 @_showElement previousController.$el
                 return
 
-        controller = @_elementControllers[@_elementControllers.length - 1]
-        controller.selected = true
+        controller = @_elementControllers[0]
+        controller.isSelected = false
+
+        [..., controller] = @_elementControllers
+        controller.isSelected = true
         @_showElement controller.$el
 
     _showElement: ($el)->
diff --git a/src/client/site/common/recipe/recipe_controller.coffee b/src/client/site/common/recipe/recipe_controller.coffee
index 9089af172..0d851b546 100644
--- a/src/client/site/common/recipe/recipe_controller.coffee
+++ b/src/client/site/common/recipe/recipe_controller.coffee
@@ -5,20 +5,21 @@
 # All rights reserved.
 #
 
-BaseController         = require '../../base_controller'
-CraftingGridController = require '../crafting_grid/crafting_grid_controller'
-SlotController         = require '../slot/slot_controller'
-{StringBuilder}        = require('crafting-guide-common').util
+BaseController         = require "../../base_controller"
+CraftingGridController = require "../crafting_grid/crafting_grid_controller"
+ItemDisplay            = require "../../../models/site/item_display"
+SlotController         = require "../slot/slot_controller"
+{StringBuilder}        = require("crafting-guide-common").util
 
 ########################################################################################################################
 
 module.exports = class RecipeController extends BaseController
 
     constructor: (options={})->
-        if not options.imageLoader? then throw new Error 'options.imageLoader is required'
-        if not options.modPack? then throw new Error 'options.modPack is required'
-        if not options.router? then throw new Error 'options.router is required'
-        options.templateName = 'common/recipe'
+        if not options.imageLoader? then throw new Error "options.imageLoader is required"
+        if not options.modPack? then throw new Error "options.modPack is required"
+        if not options.router? then throw new Error "options.router is required"
+        options.templateName = "common/recipe"
         super options
 
         @_imageLoader = options.imageLoader
@@ -29,26 +30,26 @@ module.exports = class RecipeController extends BaseController
     # BaseController Overrides #####################################################################
 
     onDidRender: ->
-        @_gridController = @addChild CraftingGridController, '.view__crafting_grid',
+        @_gridController = @addChild CraftingGridController, ".view__crafting_grid",
             modPack:     @_modPack
             imageLoader: @_imageLoader
             router:      @_router
 
-        @_outputSlotController = @addChild SlotController, '.output .view__slot',
+        @_outputSlotController = @addChild SlotController, ".output .view__slot",
             imageLoader: @_imageLoader
             modPack:     @_modPack
             router:      @_router
 
-        @$multiplier     = @$('.multiplier')
-        @$outputImg      = @$('.output img')
-        @$outputLink     = @$('.output a')
-        @$outputQuantity = @$('.quantity')
-        @$toolContainer  = @$('.tool')
+        @$multiplier     = @$(".multiplier")
+        @$outputImg      = @$(".output img")
+        @$outputLink     = @$(".output a")
+        @$outputQuantity = @$(".quantity")
+        @$toolContainer  = @$(".tool")
         super
 
     refresh: ->
         @_gridController.model = @model
-        @_outputSlotController.model = @model?.output?[0]
+        @_outputSlotController.model = @model?.output
 
         @_refreshMultiplier()
         @_refreshTools()
@@ -69,14 +70,14 @@ module.exports = class RecipeController extends BaseController
                 @_multiplier = newMultiplier
                 @_refreshMultiplier()
 
-                @trigger Event.change + ':multiplier', this, oldMultiplier, newMultiplier
+                @trigger Event.change + ":multiplier", this, oldMultiplier, newMultiplier
                 @trigger Event.change, this
 
     # Backbone.View Methods ########################################################################
 
     events: ->
         return _.extend super,
-            'click a': 'routeLinkClick'
+            "click a": "routeLinkClick"
 
     # Private Methods ##############################################################################
 
@@ -84,14 +85,15 @@ module.exports = class RecipeController extends BaseController
         if @multiplier > 1
             @$multiplier.html "x#{@multiplier}"
         else
-            @$multiplier.html ''
+            @$multiplier.html ""
 
     _refreshTools: ->
         @$toolContainer.empty()
         return unless @model?
 
-        builder = new StringBuilder
-        builder.loop @model.tools, delimiter:', ', onEach:(b, stack)=>
-            display = @_modPack.findItemDisplay stack.itemSlug
-            b.push "<a href=\"#{display.itemUrl}\">#{display.itemName}</a>"
-        @$toolContainer.html builder.toString()
+        toolLinks = []
+        for itemId, item of @model.tools
+            display = new ItemDisplay item
+            toolLinks.push "<a href=\"#{display.url}\">#{display.name}</a>"
+
+        @$toolContainer.html toolLinks.join ", "
diff --git a/src/client/site/common/slot/slot_controller.coffee b/src/client/site/common/slot/slot_controller.coffee
index ecde0b23d..a5f710f25 100644
--- a/src/client/site/common/slot/slot_controller.coffee
+++ b/src/client/site/common/slot/slot_controller.coffee
@@ -5,18 +5,19 @@
 # All rights reserved.
 #
 
-BaseController = require '../../base_controller'
+BaseController = require "../../base_controller"
+ItemDisplay = require "../../../models/site/item_display"
+{Stack} = require("crafting-guide-common").models
 
 ########################################################################################################################
 
 module.exports = class SlotController extends BaseController
 
     constructor: (options={})->
-        if not options.imageLoader? then throw new Error 'options.imageLoader is required'
-        if not options.modPack? then throw new Error 'options.modPack is required'
-        if not options.router? then throw new Error 'options.router is required'
-        # options.model should be a Stack
-        options.templateName = 'common/slot'
+        if not options.imageLoader? then throw new Error "options.imageLoader is required"
+        if not options.modPack? then throw new Error "options.modPack is required"
+        if not options.router? then throw new Error "options.router is required"
+        options.templateName = "common/slot"
         options.useAnimations = false
         super options
 
@@ -27,27 +28,31 @@ module.exports = class SlotController extends BaseController
     # BaseController Overrides #####################################################################
 
     onDidRender: ->
-        @$link = @$('a')
-        @$image = @$('img')
-        @$quantity = @$('.quantity')
+        @$link = @$("a")
+        @$image = @$("img")
+        @$quantity = @$(".quantity")
+        super
+
+    onWillChangeModel: (oldModel, newModel)->
+        if newModel? and (newModel.constructor isnt Stack) then throw new Error "newModel must be a Stack"
         super
 
     refresh: ->
         if @model?
-            display = @_modPack.findItemDisplay @model.itemSlug
-            @$link.attr 'href', display.itemUrl
+            display = new ItemDisplay @model.item
+            @$link.attr "href", display.url
 
             @_imageLoader.load display.iconUrl, @$image
 
             if @model.quantity > 1
                 @$quantity.html @model.quantity
             else
-                @$quantity.html ''
+                @$quantity.html ""
         else
-            @$link.removeAttr 'href'
-            @$quantity.html ''
+            @$link.removeAttr "href"
+            @$quantity.html ""
 
-            @$image.attr 'src', '/images/empty.png'
+            @$image.attr "src", "/images/empty.png"
 
         super
 
@@ -55,4 +60,4 @@ module.exports = class SlotController extends BaseController
 
     events: ->
         return _.extend super,
-            'click a': 'routeLinkClick'
+            "click a": "routeLinkClick"
diff --git a/src/client/site/common/stack/stack_controller.coffee b/src/client/site/common/stack/stack_controller.coffee
index 4e939ec36..7c8825877 100644
--- a/src/client/site/common/stack/stack_controller.coffee
+++ b/src/client/site/common/stack/stack_controller.coffee
@@ -6,6 +6,7 @@
 #
 
 BaseController = require '../../base_controller'
+ItemDisplay    = require "../../../models/site/item_display"
 
 ########################################################################################################################
 
@@ -38,8 +39,6 @@ module.exports = class StackController extends BaseController
         @_shouldEnableButton = options.shouldEnableButton ?= (model, button)-> true
         @_trackingContext    = options.trackingContext    ?= null
 
-        @_modPack.on c.event.change, => @tryRefresh()
-
     # Event Methods ################################################################################
 
     onFirstButtonClicked: (event)->
@@ -71,7 +70,7 @@ module.exports = class StackController extends BaseController
             @trigger c.event.change + ':quantity', this, oldQuantity, newQuantity
             @trigger c.event.change, this
 
-            tracker.trackEvent @_trackingContext, 'update-quantity', @model.itemSlug, @model.quantity
+            tracker.trackEvent @_trackingContext, 'update-quantity', @model.item.id, @model.quantity
 
     onQuantityFieldChanged: ->
         return unless @_editable
@@ -119,10 +118,10 @@ module.exports = class StackController extends BaseController
     refresh: ->
         if not @model? then throw new Error "must have a model to render"
 
-        display = @_modPack.findItemDisplay @model.itemSlug
+        display = new ItemDisplay @model.item
 
         @_imageLoader.load display.iconUrl, @$image
-        @$nameLink.html display.itemName
+        @$nameLink.html display.name
         @$nameLink.attr 'href', display.itemUrl
 
         quantityText = if @model.quantity > 10000 then "#{@model.quantity / 1000}k" else "#{@model.quantity}"
diff --git a/src/client/site/craft_page/craft_page.jade b/src/client/site/craft_page/craft_page.jade
index bcafb4bcf..32d51aec6 100644
--- a/src/client/site/craft_page/craft_page.jade
+++ b/src/client/site/craft_page/craft_page.jade
@@ -53,4 +53,4 @@
             h2 Steps
             .panel
 
-        section.view__craftsman_working
+        section.view__working_panel
diff --git a/src/client/site/craft_page/craft_page_controller.coffee b/src/client/site/craft_page/craft_page_controller.coffee
index 48467c18c..1abc722c0 100644
--- a/src/client/site/craft_page/craft_page_controller.coffee
+++ b/src/client/site/craft_page/craft_page_controller.coffee
@@ -5,14 +5,13 @@
 # All rights reserved.
 #
 
-BaseController             = require '../base_controller'
-CraftPage                  = require '../../models/site/craft_page'
-{Craftsman}                = require('crafting-guide-common').deprecated.crafting
-CraftsmanWorkingController = require './craftsman_working/craftsman_working_controller'
-InventoryController        = require '../common/inventory/inventory_controller'
-PageController             = require '../page_controller'
-{SimpleInventory}          = require('crafting-guide-common').deprecated.crafting
-StepController             = require './step/step_controller'
+CraftPage              = require "../../models/site/craft_page"
+WorkingPanelController = require "./working_panel/working_panel_controller"
+{Inventory}            = require("crafting-guide-common").models
+InventoryController    = require "../common/inventory/inventory_controller"
+{Observable}           = require("crafting-guide-common").util
+PageController         = require "../page_controller"
+StepController         = require "./step/step_controller"
 
 ########################################################################################################################
 
@@ -21,12 +20,12 @@ module.exports = class CraftPageController extends PageController
     @::SCROLL_BUFFER = 8 # px
 
     constructor: (options={})->
-        if not options.imageLoader? then throw new Error 'options.imageLoader is required'
-        if not options.modPack? then throw new Error 'options.modPack is required'
-        if not options.router? then throw new Error 'options.router is required'
-        if not options.storage? then throw new Error 'options.storage is required'
+        if not options.imageLoader? then throw new Error "options.imageLoader is required"
+        if not options.modPack? then throw new Error "options.modPack is required"
+        if not options.router? then throw new Error "options.router is required"
+        if not options.storage? then throw new Error "options.storage is required"
 
-        options.model ?= new CraftPage modPack:options.modPack
+        options.model ?= new CraftPage modPack:options.modPack, params:options.params
         options.templateName = 'craft_page'
         super options
 
@@ -35,41 +34,46 @@ module.exports = class CraftPageController extends PageController
         @_router      = options.router
         @_storage     = options.storage
 
+        @model.have.on Observable::ANY, this, "onHaveInventoryChanged"
+        @model.want.on Observable::ANY, this, "onWantInventoryChanged"
+
     # Event Methods ################################################################################
 
     onHaveInventoryChanged: ->
-        @_storage.store 'crafting-plan:have', @model.craftsman.have.unparse()
+        @_storage.store 'crafting-plan:have', @model.have.toUrlString()
 
-    onMoveNeedToHave: (itemSlug)->
-        quantity = @_needInventoryController.model.quantityOf itemSlug
-        @model.craftsman.have.add itemSlug, quantity
+    onMoveNeedToHave: (itemId)->
+        quantity = @_needInventoryController.model.getQuantity itemId
+        item = @_modPack.findItem itemId
+        @model.have.add item, quantity
 
-    onRemoveFromHaveInventory: (itemSlug)->
-        @model.craftsman.have.remove itemSlug
+    onRemoveFromHave: (itemId)->
+        @model.have.remove itemId
 
-    onRemoveFromWant: (itemSlug)->
-        @model.craftsman.want.remove itemSlug
+    onRemoveFromWant: (itemId)->
+        @model.want.remove itemId
         @onWantInventoryChanged()
 
     onSampleClicked: (event)->
         $el = $(event.target)
         while $el.length > 0
-            inventoryText = $el.attr 'data-slug'
+            inventoryText = $el.attr "data-slug"
             break if inventoryText
             $el = $el.parent()
 
         if inventoryText?
-            tracker.trackEvent c.tracking.category.craft, 'add-sample', inventoryText
-            sampleInventory = new SimpleInventory
-            sampleInventory.parse inventoryText
-            @model.craftsman.want.addInventory sampleInventory
-            @_scrollTo @$workingSection
-            @onWantInventoryChanged()
+            try
+                tracker.trackEvent c.tracking.category.craft, "add-sample", inventoryText
+                sampleInventory = Inventory.fromUrlString inventoryText, @_modPack
+                @model.want.merge sampleInventory
+                @_scrollTo @$workingSection
+            catch e
+                logger.error e
 
         return false
 
     onWantInventoryChanged: ->
-        text = @model.craftsman.want.unparse()
+        text = @model.want.toUrlString()
         url = c.url.crafting inventoryText:text
         @router.navigate url
 
@@ -79,7 +83,7 @@ module.exports = class CraftPageController extends PageController
         return c.text.craftDescription()
 
     getTitle: ->
-        description = @model.craftsman.want.toDescription()
+        description = @model.want.toDescription()
         return null unless description?
         return "Crafting Plan for #{description}"
 
@@ -91,21 +95,19 @@ module.exports = class CraftPageController extends PageController
             imageLoader:     @_imageLoader
             isAcceptable:    (item)=> item.isCraftable
             modPack:         @_modPack
-            model:           @model.craftsman.want
+            model:           @model.want
             router:          @_router
             trackingContext: c.tracking.category.craftWant
-        @_wantInventoryController.on c.event.button.first, (c, s)=> @onRemoveFromWant(s)
-        @_wantInventoryController.on c.event.change, (c)=> @onWantInventoryChanged()
+        @_wantInventoryController.on c.event.button.first, (controller, itemId)=> @onRemoveFromWant itemId
 
         @_haveInventoryController = @addChild InventoryController, '.have .view__inventory',
             firstButtonType: 'down'
             imageLoader:     @_imageLoader
             modPack:         @_modPack
-            model:           @model.craftsman.have
+            model:           @model.have
             router:          @_router
             trackingContext: c.tracking.category.craftHave
-        @_haveInventoryController.on c.event.button.first, (controller, itemSlug)=>
-            @onRemoveFromHaveInventory itemSlug
+        @_haveInventoryController.on c.event.button.first, (controller, itemId)=> @onRemoveFromHave itemId
 
         @_needInventoryController = @addChild InventoryController, '.need .view__inventory',
             editable:        false
@@ -115,11 +117,9 @@ module.exports = class CraftPageController extends PageController
             model:           null
             router:          @_router
             trackingContext: c.tracking.category.craftNeed
-        @_needInventoryController.on c.event.button.first, (c, s)=> @onMoveNeedToHave(s)
+        @_needInventoryController.on c.event.button.first, (controller, itemId)=> @onMoveNeedToHave itemId
 
-        @_workingSectionController = @addChild CraftsmanWorkingController, '.view__craftsman_working',
-            model: @model.craftsman
-        @_workingSectionController.on c.event.click, => @_scrollTo @$workingSection
+        @_workingPanelController = @addChild WorkingPanelController, '.view__working_panel', model:@model
 
         @$haveSection         = @$('section.have')
         @$instructionsSection = @$('section.instructions')
@@ -128,7 +128,7 @@ module.exports = class CraftPageController extends PageController
         @$stepsContainer      = @$('section.steps .panel')
         @$stepsSection        = @$('section.steps')
         @$toolsSection        = @$('section.tools')
-        @$workingSection      = @$('.view__craftsman_working')
+        @$workingSection      = @$('.view__working_panel')
 
         if c.screen.type.compute() is c.screen.type.mobile
             @$('.view__inventory.large').removeClass 'large'
@@ -136,20 +136,15 @@ module.exports = class CraftPageController extends PageController
         super
 
     onWillRender: ->
-        @model.craftsman.have.clear()
-        @model.craftsman.have.parse @_storage.load('crafting-plan:have')
-        @model.craftsman.have.on c.event.change, => @onHaveInventoryChanged()
-
-        @model.craftsman.want.on c.event.change, => @refresh()
-
-        @model.craftsman.on c.event.change + ":stage", =>
-            return unless @model.craftsman.stage is Craftsman::STAGE.COMPLETE
-            @_scrollTo @$needSection
+        @model.have.clear()
+        @model.have.merge Inventory.fromUrlString @_storage.load('crafting-plan:have')
+        @model.have.on Observable::ANY, this, "onHaveInventoryChanged"
+        @model.want.on Observable::ANY, this, "tryRefresh"
 
         super
 
     refresh: ->
-        @_needInventoryController.model = @model.craftsman.plan?.need
+        @_needInventoryController.model = @model.currentPlan?.need
         @_refreshOutdated()
         @_refreshSectionVisibility()
         @_refreshSteps()
@@ -165,33 +160,30 @@ module.exports = class CraftPageController extends PageController
     # Private Methods ################################################################################
 
     _addTools: (controller)->
-        controller.model.addToolsTo @model.craftsman.want
+        controller.model.addToolsTo @model.want
 
     _completeStep: (controller)->
-        controller.markComplete @model.craftsman.have
+        controller.markComplete @model.have
 
     _isAddingToolsPossible: (controller)->
         tools = controller.model.recipe.tools
         return false unless tools.length > 0
 
-        have = @model.craftsman.have
-        want = @model.craftsman.want
+        have = @model.have
+        want = @model.want
 
         for stack in tools
-            return false if have.hasAtLeast stack.itemSlug
-            return false if want.hasAtLeast stack.itemSlug
+            return false if @model.have.contains stack.item.id
+            return false if @model.want.contains stack.item.id
 
         return true
 
     _isStepCompletable: (controller)->
-        recipe = controller.model.recipe
-        for stack in recipe.output
-            return false if @model.craftsman.want.hasAtLeast stack.itemSlug
-
-        return true
+        wantsOutput = @model.want.contains controller.model.recipe.output.item.id
+        return wantsOutput
 
     _refreshOutdated: ->
-        if @model.craftsman.stage is Craftsman::STAGE.OUTDATED
+        if @model.isOutdated
             @$el.addClass 'outdated'
         else
             @$el.removeClass 'outdated'
@@ -205,22 +197,25 @@ module.exports = class CraftPageController extends PageController
 
         visibleSections = []
 
-        if @model.craftsman.want.isEmpty
+        # TODO: Figure out what to do if the planner can't make a valid plan
+        # else if @model.craftsman.stage is Craftsman::STAGE.INVALID
+        #     visibleSections.push el for el in [@$wantSection, @$haveSection, @$workingSection]
+        # TODO: Play around and see if the algo ever takes too long
+        # else if not @model.craftsman.complete
+        #     visibleSections.push el for el in [@$wantSection, @$haveSection, @$workingSection]
+
+        if @model.want.isEmpty
             visibleSections.push el for el in [@$instructionsSection, @$wantSection]
-        else if @model.craftsman.stage is Craftsman::STAGE.INVALID
-            visibleSections.push el for el in [@$wantSection, @$haveSection, @$workingSection]
-        else if not @model.craftsman.complete
-            visibleSections.push el for el in [@$wantSection, @$haveSection, @$workingSection]
         else
             visibleSections.push el for el in [@$haveSection, @$wantSection, @$workingSection]
-            if @model.craftsman.plan?
+            if @model.currentPlan?
                 visibleSections.push el for el in [@$needSection, @$stepsSection]
 
         @hide $el for $el in allSections
         @show $el for $el in visibleSections
 
     _refreshSteps: ->
-        steps = @model.craftsman.plan?.steps or []
+        steps = @model.currentPlan?.steps or []
         @_stepControllers ?= []
         index = 0
 
diff --git a/src/client/site/craft_page/craftsman_working/craftsman_working_controller.coffee b/src/client/site/craft_page/craftsman_working/craftsman_working_controller.coffee
deleted file mode 100644
index f2e214538..000000000
--- a/src/client/site/craft_page/craftsman_working/craftsman_working_controller.coffee
+++ /dev/null
@@ -1,106 +0,0 @@
-#
-# Crafting Guide - craftsman_working_controller.coffee
-#
-# Copyright © 2014-2017 by Redwood Labs
-# All rights reserved.
-#
-
-BaseController = require '../../base_controller'
-{Craftsman}    = require('crafting-guide-common').deprecated.crafting
-
-########################################################################################################################
-
-module.exports = class CraftsmanWorkingController extends BaseController
-
-    @::HIDE_TIMER_DURATION = 2000
-
-    constructor: (options={})->
-        if not options.model then throw new Error 'options.model is required'
-        options.templateName = 'craft_page/craftsman_working'
-        super options
-
-        @_hideTimer = null
-
-    # Event Methods ################################################################################
-
-    onButtonClicked: ->
-        tracker.trackEvent c.tracking.category.craft, 'start'
-        @trigger c.event.click
-        @model.reset()
-        @model.work()
-        return false
-
-    # BaseController Methods #######################################################################
-
-    onDidModelChange: ->
-        @refresh()
-
-    onDidRender: ->
-        @$button   = @$('.button')
-        @$count    = @$('.count p')
-        @$message  = @$('.message p')
-        @$outdated = @$('.outdated')
-        @$waiting  = @$('.waiting')
-
-        @_controls = [@$button, @$count, @$message, @$outdated, @$waiting]
-        super
-
-    refresh: ->
-        return unless @$message? and @$count?
-
-        button = count = message = outdated = waiting = null
-
-        switch @model.stage
-            when Craftsman::STAGE.READY
-                message = 'Ready to compute crafting plan!'
-                count = 'Click "Calculate" to continue.'
-                button = true
-            when Craftsman::STAGE.GRAPHING
-                message = 'Researching recipes...'
-                count = "Found #{@model.stageCount} recipes so far..."
-                watiing = true
-            when Craftsman::STAGE.PLANNING
-                message = 'Figuring out possible crafting plans...'
-                count = "Found #{@model.stageCount} possibilities so far..."
-                watiing = true
-            when Craftsman::STAGE.ANALYZING
-                message = 'Looking for the best plan...'
-                count = "Finished checking #{@model.stageCount} so far..."
-                watiing = true
-            when Craftsman::STAGE.COMPLETE
-                message = 'Crafting plan is complete.'
-            when Craftsman::STAGE.INVALID
-                message = 'Couldn\'t make a crafting plan!'
-                count = 'Please report this problem using the Feedback box.'
-            when Craftsman::STAGE.OUTDATED
-                message = 'Your crafting plan is out of date!'
-                count = 'Click "Calculate" to re-compute.'
-                button = true
-                outdated = true
-
-        @hide(control) for control in @_controls
-
-        if button?
-            @show @$button
-
-        if count?
-            @show @$count
-            @$count.html count
-
-        if message?
-            @show @$message
-            @$message.html message
-
-        if outdated?
-            @show @$outdated
-
-        if waiting?
-            @show @$waiting
-
-        super
-
-    # Backbone.View Overrides ######################################################################
-
-    events: ->
-        return _.extend super,
-            'click .button': 'onButtonClicked'
diff --git a/src/client/site/craft_page/step/step_controller.coffee b/src/client/site/craft_page/step/step_controller.coffee
index eef7e330e..f5d364860 100644
--- a/src/client/site/craft_page/step/step_controller.coffee
+++ b/src/client/site/craft_page/step/step_controller.coffee
@@ -6,16 +6,19 @@
 #
 
 BaseController      = require '../../base_controller'
+{Inventory}         = require("crafting-guide-common").models
+{CraftingPlanStep}  = require("crafting-guide-common").crafting
 InventoryController = require '../../common/inventory/inventory_controller'
 RecipeController    = require '../../common/recipe/recipe_controller'
-{SimpleInventory}   = require('crafting-guide-common').deprecated.crafting
+
 
 ########################################################################################################################
 
 module.exports = class StepController extends BaseController
 
     constructor: (options={})->
-        if not options.model? then throw new Error 'options.model is required'
+        if options.model?.constructor isnt CraftingPlanStep
+            throw new Error "options.model must be a CraftingPlanStep"
         if not options.modPack? then throw new Error 'options.modPack is required'
         if not options.imageLoader? then throw new Error 'options.imageLoader is required'
         options.templateName = 'craft_page/step'
@@ -41,7 +44,7 @@ module.exports = class StepController extends BaseController
 
     onCompleteButtonClicked: (event)->
         return if @$completeButton.hasClass 'disabled'
-        tracker.trackEvent c.tracking.category.craft, 'mark-complete', null, @model.number
+        tracker.trackEvent c.tracking.category.craft, 'mark-complete', null, @model.count
         @onComplete this
 
     onShowToolPlan: (event)->
@@ -54,7 +57,7 @@ module.exports = class StepController extends BaseController
         @inventoryController = @addChild InventoryController, '.view__inventory',
             editable:    false
             imageLoader: @_imageLoader
-            model:       @model.inventory
+            model:       @model.inputInventory
             modPack:     @_modPack
             router:      @_router
 
@@ -78,12 +81,11 @@ module.exports = class StepController extends BaseController
         return super
 
     refresh: ->
-        itemDisplay = @_modPack.findItemDisplay @model.recipe.output[0].itemSlug
-        @$header.html "#{@model.number}. #{itemDisplay.itemName}"
+        @$header.html "#{@model.number}. #{@model.recipe.output.item.displayName}"
 
-        @inventoryController.model   = @model.inventory
+        @inventoryController.model   = @model.inputInventory
         @recipeController.model      = @model.recipe
-        @recipeController.multiplier = @model.multiplier
+        @recipeController.multiplier = @model.count
 
         @_refreshCompleteButton()
         @_refreshToolButton()
@@ -100,12 +102,11 @@ module.exports = class StepController extends BaseController
     # Private Methods ##############################################################################
 
     _refreshToolButton: ->
-        inventory = new SimpleInventory {}, modPack:@_modPack
-        for toolStack in @model.recipe.tools
-            inventory.add toolStack.itemSlug, toolStack.quantity
-        inventory.localize()
+        inventory = new Inventory
+        for itemId, item in @model.recipe.tools
+            inventory.add item
 
-        inventoryText = inventory.unparse()
+        inventoryText = inventory.toUrlString()
         @$toolButton.attr 'href', "/craft/#{inventoryText}"
         @$toolButton.attr 'target', inventoryText
 
diff --git a/src/client/site/craft_page/craftsman_working/craftsman_working.jade b/src/client/site/craft_page/working_panel/working_panel.jade
similarity index 100%
rename from src/client/site/craft_page/craftsman_working/craftsman_working.jade
rename to src/client/site/craft_page/working_panel/working_panel.jade
diff --git a/src/client/site/craft_page/craftsman_working/craftsman_working.scss b/src/client/site/craft_page/working_panel/working_panel.scss
similarity index 100%
rename from src/client/site/craft_page/craftsman_working/craftsman_working.scss
rename to src/client/site/craft_page/working_panel/working_panel.scss
diff --git a/src/client/site/craft_page/working_panel/working_panel_controller.coffee b/src/client/site/craft_page/working_panel/working_panel_controller.coffee
new file mode 100644
index 000000000..06da9fa4a
--- /dev/null
+++ b/src/client/site/craft_page/working_panel/working_panel_controller.coffee
@@ -0,0 +1,89 @@
+#
+# Crafting Guide - working_panel_controller.coffee
+#
+# Copyright © 2014-2017 by Redwood Labs
+# All rights reserved.
+#
+
+BaseController = require '../../base_controller'
+CraftPage      = require "../../../models/site/craft_page"
+
+########################################################################################################################
+
+module.exports = class WorkingPanelController extends BaseController
+
+    @::HIDE_TIMER_DURATION = 2000
+
+    constructor: (options={})->
+        if not options.model?.constructor is CraftPage then throw new Error "options.model must be a CraftPage"
+        options.templateName = "craft_page/working_panel"
+        super options
+
+        @_hideTimer = null
+
+    # Event Methods ################################################################################
+
+    onButtonClicked: ->
+        tracker.trackEvent c.tracking.category.craft, "start"
+        @trigger c.event.click
+        @model.createPlan()
+        return false
+
+    # BaseController Methods #######################################################################
+
+    onDidModelChange: ->
+        @refresh()
+
+    onDidRender: ->
+        @$button   = @$('.button')
+        @$count    = @$('.count p')
+        @$message  = @$('.message p')
+        @$outdated = @$('.outdated')
+        @$waiting  = @$('.waiting')
+
+        @_controls = [@$button, @$count, @$message, @$outdated, @$waiting]
+        super
+
+    refresh: ->
+        return unless @$message? and @$count?
+
+        button = count = message = outdated = null
+
+        if @model.isOutdated
+            message = "Your crafting plan is out of date!"
+            count = 'Click "Calculate" to re-compute.'
+            button = true
+            outdated = true
+        else if @model.currentPlan?
+            message = "Crafting plan is complete."
+        else
+            message = "Ready to compute crafting plan!"
+            count = 'Click "Calculate" to continue.'
+            button = true
+
+        @hide(control) for control in @_controls
+
+        if button?
+            @show @$button
+
+        if count?
+            @show @$count
+            @$count.html count
+
+        if message?
+            @show @$message
+            @$message.html message
+
+        if outdated?
+            @show @$outdated
+
+        if waiting?
+            @show @$waiting
+
+        super
+
+    # Backbone.View Overrides ######################################################################
+
+    events: ->
+        return _.extend super,
+            'click .button': 'onButtonClicked'
diff --git a/src/client/site/router.coffee b/src/client/site/router.coffee
index b7624a57a..39783e41f 100644
--- a/src/client/site/router.coffee
+++ b/src/client/site/router.coffee
@@ -117,8 +117,7 @@ module.exports = class Router extends Backbone.Router
         @route__craft()
 
     route__craft: (text)->
-        controller = new CraftPageController @_makeOptions {}
-        controller.model.params = inventoryText:text
+        controller = new CraftPageController @_makeOptions params:inventoryText:text
         @_siteController.setPage 'craft', controller
 
     route__login: ->