diff --git a/js/cells/GIKCell.js b/js/cells/GIKCell.js
index 4712e50870fc458fa2b676f4d0608cf426e3d053..b81dab5da187e7822777f6901434f04c08cecb01 100644
--- a/js/cells/GIKCell.js
+++ b/js/cells/GIKCell.js
@@ -15,6 +15,10 @@ define(['underscore', 'three', 'threeModel', 'lattice', 'appState', 'cubeCell'],
         return null;//never show the gik cell
     };
 
+    GIKCell.prototype.getLength = function(){
+        return this.superCell.getLength();
+    };
+
     GIKCell.prototype._initParts = function(callback){
         if (!this.superCell) return;
         var self = this;
@@ -57,7 +61,7 @@ define(['underscore', 'three', 'threeModel', 'lattice', 'appState', 'cubeCell'],
                         isBridge: false
                     }));
                 }
-                parts.push(new PartSubclass(self.index.x, self, {isBridge: true}));
+                if (self.getLength() > 1) parts.push(new PartSubclass(self.index.x, self, {isBridge: true}));
                 callback(parts);
             });
         }
diff --git a/js/menus/templates/LatticeMenuView.html b/js/menus/templates/LatticeMenuView.html
index d8d4c237a53b5b3d7ad838f2d2ed69a99b685018..38144c69dd52b48c3e1c9eb583ec1091e184ca43 100644
--- a/js/menus/templates/LatticeMenuView.html
+++ b/js/menus/templates/LatticeMenuView.html
@@ -25,15 +25,17 @@ Type:  
             <% }); %>
         </ul>
     </div><br/><br/>
-Part Type: &nbsp;&nbsp;
-    <div class="btn-group">
-        <button data-toggle="dropdown" class="btn dropdown-toggle" type="button"><%= allLattices[cellType].connection[connectionType].type[latticeType].parts[partType].name %><span class="caret"></span></button>
-        <ul role="menu" class="dropdown-menu">
-            <% _.each(allLattices[cellType].connection[connectionType].type[latticeType].parts, function(val, key){ %>
-                <li><a class="lattice dropdownSelector" data-property="partType" data-value="<%= key %>" href="#"><%= val.name %></a></li>
-            <% }); %>
-        </ul>
-    </div><br/><br/>
+<% if(allLattices[cellType].connection[connectionType].type[latticeType].parts){ %>
+    Part Type: &nbsp;&nbsp;
+        <div class="btn-group">
+            <button data-toggle="dropdown" class="btn dropdown-toggle" type="button"><%= allLattices[cellType].connection[connectionType].type[latticeType].parts[partType].name %><span class="caret"></span></button>
+            <ul role="menu" class="dropdown-menu">
+                <% _.each(allLattices[cellType].connection[connectionType].type[latticeType].parts, function(val, key){ %>
+                    <li><a class="lattice dropdownSelector" data-property="partType" data-value="<%= key %>" href="#"><%= val.name %></a></li>
+                <% }); %>
+            </ul>
+        </div><br/><br/>
+<% } %>
 Aspect Ratio:&nbsp;&nbsp;
     <input data-property="aspectRatio" data-key="x" value="<%= aspectRatio.x %>" placeholder="X" class="form-control lattice floatInput" type="text">&nbsp;
     <input data-property="aspectRatio" data-key="y" value="<%= aspectRatio.y %>" placeholder="Y" class="form-control lattice floatInput" type="text">&nbsp;
diff --git a/js/models/AppState.js b/js/models/AppState.js
index 9b150c3ca9c254b9a7b524ce1d7e504c1238fd9a..355a88ad98ff9fcafb578e42ad4349d537d7e174 100644
--- a/js/models/AppState.js
+++ b/js/models/AppState.js
@@ -199,7 +199,7 @@ define(['underscore', 'backbone', 'threeModel', 'three', 'plist', 'globals'], fu
             } else this.downKeys[e.keyCode] = false;
 
 //            console.log(e);
-//            console.log(e.keyCode);
+            console.log(e.keyCode);
             switch(e.keyCode){
                 case 8://delete key - causes back nav in chrome, super annoying
                     e.preventDefault();
@@ -250,7 +250,8 @@ define(['underscore', 'backbone', 'threeModel', 'three', 'plist', 'globals'], fu
                     e.preventDefault();
                     if (state && this.get("currentTab") == "animate") this.set("stockSimulationPlaying", !this.get("stockSimulationPlaying"));
                     break;
-                case 50://2-9
+                case 49://1-9
+                case 50:
                 case 51:
                 case 52:
                 case 53:
@@ -260,7 +261,15 @@ define(['underscore', 'backbone', 'threeModel', 'three', 'plist', 'globals'], fu
                 case 57:
                     if (this.lattice.get("connectionType") != "gik") break;
                     if (state) {
-                        this.set("gikLength", e.keyCode-48);
+                        var val = e.keyCode-48;
+                        var range = plist.allLattices[this.lattice.get("cellType")].connection[this.lattice.get("connectionType")].type[this.lattice.get("latticeType")].options.gikRange;
+                        if (range){
+                            if ((range[0] > 0 && val < range[0]) || (range[1] > 1 && val > range[1])){
+                                console.warn("gik length out of range");
+                                return;
+                            }
+                        }
+                        this.set("gikLength", val);
                     }
                     break;
                 case 87://w - increase supercell index
diff --git a/js/parts/GIKPart.js b/js/parts/GIKPart.js
index 9f2fca8ff479cf1157df686a98a2dcade49e1f7f..f1f710c3c574f34fc7890c145f2f42862f6b2238 100644
--- a/js/parts/GIKPart.js
+++ b/js/parts/GIKPart.js
@@ -41,7 +41,7 @@ define(['underscore', 'stlLoader', 'part', 'bin!gikPartSTL', 'bin!gikEndPartSTL'
     };
 
     GIKPart.prototype._getGIKLength = function(){
-        return this.parentCell.superCell.getLength();
+        return this.parentCell.getLength();
     };
 
     return GIKPart;
diff --git a/js/plists/PList.js b/js/plists/PList.js
index 123f601ca58e80a068eb90e74a8b4198b966c15c..1e4a9bd67b8580e61b0b56167ccaf79813b3ea5c 100644
--- a/js/plists/PList.js
+++ b/js/plists/PList.js
@@ -234,7 +234,9 @@ define(['three'], function(THREE){
                                 aspectRatio: new THREE.Vector3(1,1,1.28),
                                 materialClasses: ['electronic'],
                                 options: {
-                                    gikLength: 4
+                                    gikLength: 4,
+                                    gikRange: [1,-1],
+                                    units: "mm"
                                 }
                             },
                             lego: {
@@ -265,6 +267,7 @@ define(['three'], function(THREE){
                                 materialClasses: ['dna'],
                                 options: {
                                     gikLength: 2,
+                                    gikRange: [1,2],
                                     scale: 2.5,
                                     units: 'nm'
                                 }
@@ -272,7 +275,8 @@ define(['three'], function(THREE){
                             default: {
                                 name: "Default",
                                 parts: null,
-                                aspectRatio: new THREE.Vector3(1,1,1)
+                                aspectRatio: new THREE.Vector3(1,1,1),
+                                options:{}
                             }
                         }
                     }