diff --git a/web/app/3d/ctrl.js b/web/app/3d/ctrl.js
index 49f4f986..a9b6ea03 100644
--- a/web/app/3d/ctrl.js
+++ b/web/app/3d/ctrl.js
@@ -2,6 +2,27 @@
 TCAD.UI = function(app) {
   this.app = app;
   this.viewer = app.viewer;
+
+  var box = new TCAD.toolkit.Box();
+  var propFolder = new TCAD.toolkit.Folder("Solid's Properties");
+  var cameraFolder = new TCAD.toolkit.Folder("Camera");
+  var objectsFolder = new TCAD.toolkit.Folder("Objects");
+  var modificationsFolder = new TCAD.toolkit.Folder("Modifications");
+  TCAD.toolkit.add(box, propFolder);
+  TCAD.toolkit.add(propFolder, new TCAD.toolkit.Button("Extrude"));
+  TCAD.toolkit.add(propFolder, new TCAD.toolkit.Button("Cut"));
+  TCAD.toolkit.add(propFolder, new TCAD.toolkit.Button("Edit"));
+  TCAD.toolkit.add(propFolder, new TCAD.toolkit.Button("Refresh Sketches"));
+  TCAD.toolkit.add(propFolder, new TCAD.toolkit.Text("Message"));
+  TCAD.toolkit.add(box, cameraFolder);
+  TCAD.toolkit.add(cameraFolder, new TCAD.toolkit.Number("x"));
+  TCAD.toolkit.add(cameraFolder, new TCAD.toolkit.Number("y"));
+  TCAD.toolkit.add(cameraFolder, new TCAD.toolkit.Number("z"));
+  TCAD.toolkit.add(box, objectsFolder);
+  TCAD.toolkit.add(box, modificationsFolder);
+  this.modificationsTreeComp = new TCAD.toolkit.Tree();
+  TCAD.toolkit.add(cameraFolder, this.modificationsTreeComp);
+
   this.dat = new dat.GUI();
   var ui = this;
   var gui = this.dat;
diff --git a/web/app/3d/main.js b/web/app/3d/main.js
index d527df48..06866b5b 100644
--- a/web/app/3d/main.js
+++ b/web/app/3d/main.js
@@ -156,10 +156,15 @@ TCAD.App.prototype.extrude = function() {
   }
   var polyFace = this.viewer.selectionMgr.selection[0];
   var height = prompt("Height", "50");
-  
+  if (!height) return;
+
   var app = this;
-  this.craft.modify(polyFace.solid, function() {
-    return TCAD.craft.extrude(app, polyFace, polyFace.solid.polyFaces, height);
+  var solids = [polyFace.solid];
+  this.craft.modify({
+    type: 'PAD',
+    solids : solids,
+    face : polyFace,
+    height : height
   });
 };
 
@@ -170,12 +175,16 @@ TCAD.App.prototype.cut = function() {
   }
   var polyFace = this.viewer.selectionMgr.selection[0];
   var depth = prompt("Depth", "50");
+  if (!depth) return;
 
   var app = this;
-  this.craft.modify(polyFace.solid, function() {
-    return TCAD.craft.cut(app, polyFace, polyFace.solid.polyFaces, depth);
+  var solids = [polyFace.solid];
+  this.craft.modify({
+    type: 'CUT',
+    solids : solids,
+    face : polyFace,
+    depth : depth
   });
-
 };
 
 TCAD.App.prototype.refreshSketches = function() {
diff --git a/web/app/engine.js b/web/app/engine.js
index 331ecfc9..66eb323f 100644
--- a/web/app/engine.js
+++ b/web/app/engine.js
@@ -107,6 +107,12 @@ TCAD.utils.fixCCW = function(path, normal) {
   return path;
 };
 
+TCAD.utils.addAll = function(arr, arrToAdd) {
+  for (var i = 0; i < arrToAdd.length; i++) {
+    arr.push(arrToAdd[i]);
+  }
+};
+
 TCAD.TOLERANCE = 1E-6;
 
 TCAD.utils.areEqual = function(v1, v2, tolerance) {
@@ -320,7 +326,7 @@ TCAD.geom.extrude = function(source, target) {
   return poly;
 };
 
-TCAD.geom.FACE_COUNTER = 0;
+TCAD.geom.SOLID_COUNTER = 0;
 
 /** @constructor */
 TCAD.Solid = function(polygons, material) {
@@ -329,6 +335,9 @@ TCAD.Solid = function(polygons, material) {
   
   this.meshObject = new THREE.Mesh(this, material);
 
+  this.id = TCAD.geom.SOLID_COUNTER ++;
+  this.faceCounter = 0;
+
   this.polyFaces = [];
   var scope = this;
   function pushVertices(vertices) {
@@ -423,7 +432,7 @@ TCAD.SketchFace = function(solid, poly) {
   var proto = poly.__face;
   poly.__face = this;
   if (proto === undefined) {
-    this.id = TCAD.geom.FACE_COUNTER++;
+    this.id = solid.id + ":" + (solid.faceCounter++);
     this.sketchGeom = null;
   } else {
     this.id = proto.id;
diff --git a/web/app/ui/toolkit.js b/web/app/ui/toolkit.js
new file mode 100644
index 00000000..f79ba70a
--- /dev/null
+++ b/web/app/ui/toolkit.js
@@ -0,0 +1,62 @@
+TCAD.toolkit = {};
+
+TCAD.toolkit.add = function(parent, child) {
+  parent.content.append(child.root);
+};
+
+TCAD.toolkit.Box = function() {
+  this.root = this.content = $('<div class="tc-box" />');
+  this.root.addClass('tc-box');
+  this.root.appendTo('body');
+};
+
+TCAD.toolkit.Folder = function(title) {
+  this.root = $('<div/>', {class: 'tc-folder'});
+  this.content = $('<div/>', {class: 'tc-scroll'});
+  this.root.append($('<div/>', {text: title, class: 'tc-row tc-title'}));
+  this.root.append(this.content);
+};
+
+TCAD.toolkit.Button = function(title) {
+  this.root = $('<div/>',
+    {class: 'tc-row tc-ctrl tc-ctrl-btn', text: title});
+};
+
+TCAD.toolkit.propLayout = function(root, name, valueEl) {
+  root.append($('<span/>', {class: 'tc-prop-name', text: name}))
+    .append($('<div/>', {class: 'tc-prop-value'})
+    .append(valueEl));
+};
+
+TCAD.toolkit.Number = function(name) {
+  this.root = $('<div/>', {class: 'tc-row tc-ctrl tc-ctrl-number'});
+  TCAD.toolkit.propLayout(this.root, name, $('<input type="text"/>'))
+};
+
+TCAD.toolkit.Text = function(name) {
+  this.root = $('<div/>', {class: 'tc-row tc-ctrl tc-ctrl-text'});
+  TCAD.toolkit.propLayout(this.root, name, $('<input type="text" />'))
+};
+
+TCAD.toolkit.Tree = function() {
+  this.root = $('<div/>', {class: 'tc-tree'});
+};
+
+TCAD.toolkit.Tree.prototype.set = function(data) {
+  this.root.empty();
+  this._fill(this.root, data.children);
+};
+
+TCAD.toolkit.Tree.prototype._fill = function(parent, data) {
+  parent.append($('<div/>', {text : data.name}));
+  if (data.children !== undefined && data.children.length !== 0) {
+    var ul = $('<ul>');
+    parent.append(ul);
+    for (var i = 0; i < data.children.length; i++) {
+      var li  = $('<li/>');
+      ul.append(li);
+      var child = data.children[i];
+      this._fill(li, child);
+    }
+  }
+};
diff --git a/web/app/workbench.js b/web/app/workbench.js
index 7eb19b10..4a532765 100644
--- a/web/app/workbench.js
+++ b/web/app/workbench.js
@@ -72,38 +72,6 @@ TCAD.workbench.serializeSolid = function(solid) {
   return data;
 };
 
-TCAD.workbench.applyHistory = function(history) {
-
-  for (var hi = 0; hi < history.length; ++hi) {
-    var mod = history[hi];
-    switch (mod.operation) {
-    }
-
-  }
-};
-
-TCAD.workbench.Cut = function() {
-
-  this.depth = null;
-
-  this.load = function(data) {
-    this.depth = data.depth;
-  };
-
-  this.save = function() {
-    return {
-      depth : this.depth
-    };
-  };
-
-  this.apply = function(app, face, faces) {
-    TCAD.craft.cut(app, face, faces, this.depth);
-  };
-};
-
-TCAD.workbench.Cut.prototype.TYPE = 'CUT';
-
-
 TCAD.craft = {};
 
 TCAD.craft.getSketchedPolygons3D = function(app, face) {
@@ -142,16 +110,18 @@ TCAD.craft.getSketchedPolygons3D = function(app, face) {
   return sketchedPolygons;
 };
 
-TCAD.craft.extrude = function(app, face, faces, height) {
+TCAD.craft.extrude = function(app, request) {
+  var face = request.face;
   var sketchedPolygons = TCAD.craft.getSketchedPolygons3D(app, face);
   if (sketchedPolygons == null) return null;
 
-  var newSolidFaces = [];
+  var faces = TCAD.craft.collectFaces(request.solids);
+
   var normal = face.polygon.normal;
 
   var toMeldWith = [];
   for (var i = 0; i < sketchedPolygons.length; i++) {
-    var extruded = TCAD.geom.extrude(sketchedPolygons[i], normal.multiply(height));
+    var extruded = TCAD.geom.extrude(sketchedPolygons[i], normal.multiply(request.height));
     toMeldWith = toMeldWith.concat(TCAD.craft._makeFromPolygons(extruded));
   }
   var work = TCAD.craft._makeFromPolygons(faces.map(function(f){ return f.polygon }));
@@ -218,7 +188,7 @@ TCAD.craft._mergeCSGPolygons = function (__cgsPolygons, allPoints) {
         vertices: cp.vertices.map(function (cv) {
           return vec(cv.pos)
         }),
-        csgInfo : cp.shared.__tcad,
+        shared : cp.shared.__tcad,
         normal: vec(cp.plane.normal),
         w: cp.plane.w
       };
@@ -450,7 +420,7 @@ TCAD.craft._mergeCSGPolygons = function (__cgsPolygons, allPoints) {
         vertices : path,
         normal : csgData.normal,
         w : csgData.w,
-        csgInfo : csgData.csgInfo
+        shared : csgData.shared
       });
     }
   }
@@ -526,7 +496,10 @@ TCAD.craft._makeFromPolygons = function(polygons) {
     }
     var pid = poly.id;
     var shared = new CSG.Polygon.Shared([pid, pid, pid, pid]);
-    shared.__tcad = poly.csgInfo;
+    shared.__tcad = {
+      csgInfo : poly.csgInfo,
+      face : poly.__face
+    };
     var refs = poly.triangulate();
     for ( var i = 0;  i < refs.length; ++ i ) {
       var a = refs[i][0] + off;
@@ -628,7 +601,7 @@ TCAD.craft.reconstruct = function (cut) {
       return {
         vertices : path.vertices.map(function(v) {return tr.apply(v);}),
         normal : path.normal,
-        csgInfo : path.csgInfo
+        shared : path.shared
       }
     });
 
@@ -715,7 +688,10 @@ TCAD.craft.reconstruct = function (cut) {
         var p = new TCAD.Polygon(path.vertices, path.holes.map(function (path) {
           return path.vertices
         }), path.normal);
-        p.csgInfo = path.csgInfo;
+        if (path.shared !== undefined) {
+          p.csgInfo = path.shared.csgInfo;
+          p.__face = path.shared.face;
+        }
         return p;
       })
     );
@@ -724,17 +700,25 @@ TCAD.craft.reconstruct = function (cut) {
   return result;
 };
 
-TCAD.craft.cut = function(app, face, faces, depth) {
+TCAD.craft.collectFaces = function(solids) {
+  var faces = [];
+  for (var i = 0; i < solids.length; i++) {
+     TCAD.utils.addAll(faces, solids[i].polyFaces);
+  }
+  return faces;
+};
 
+TCAD.craft.cut = function(app, request) {
+  var face = request.face;
   var sketchedPolygons = TCAD.craft.getSketchedPolygons3D(app, face);
   if (sketchedPolygons == null) return null;
 
-  var newSolidFaces = [];
+  var faces = TCAD.craft.collectFaces(request.solids);
   var normal = face.polygon.normal;
 
   var cutter = [];
   for (var i = 0; i < sketchedPolygons.length; i++) {
-    var extruded = TCAD.geom.extrude(sketchedPolygons[i], normal.multiply( - depth));
+    var extruded = TCAD.geom.extrude(sketchedPolygons[i], normal.multiply( - request.depth));
     cutter = cutter.concat(TCAD.craft._makeFromPolygons(extruded));
   }
   var work = TCAD.craft._makeFromPolygons(faces.map(function(f){ return f.polygon }));
@@ -754,15 +738,45 @@ TCAD.Craft = function(app) {
 TCAD.Craft.prototype.current = function() {
   return this.history[this.history.length - 1];
 };
-  
-TCAD.Craft.prototype.modify = function(solid, modification) {
-  var faces = modification();
-  if (faces == null) return;
-  this.app.viewer.scene.remove( solid.meshObject );
-  this.app.viewer.scene.add(TCAD.utils.createSolidMesh(faces));
 
+TCAD.craft.detach = function(request) {
+  var detachedConfig = {};
+  for (var prop in request) {
+    if (request.hasOwnProperty(prop)) {
+      var value = request[prop];
+      if (typeof(value) === 'object' && value.id !== undefined) {
+        detachedConfig[prop] = value.id;
+      } else {
+        detachedConfig[prop] = value;
+      }
+    }
+  }
+  return detachedConfig
+};
+
+TCAD.Craft.prototype.modify = function(request) {
+
+  var op = TCAD.craft.OPS[request.type];
+  if (!op) return;
+
+  var detachedRequest = TCAD.craft.detach(request);
+  var newFaces = op(this.app, request);
+
+  if (newFaces == null) return;
+  for (var i = 0; i < request.solids.length; i++) {
+    var solid = request.solids[i];
+    this.app.viewer.scene.remove( solid.meshObject );
+  }
+  this.app.viewer.scene.add(TCAD.utils.createSolidMesh(newFaces));
+  this.history.push(detachedRequest);
+  this.app.bus.notify('operation');
   //REMOVE IT
   this.app._refreshSketches();
 
   this.app.viewer.render();
 };
+
+TCAD.craft.OPS = {
+  CUT : TCAD.craft.cut,
+  PAD : TCAD.craft.extrude
+};
diff --git a/web/css/toolkit.css b/web/css/toolkit.css
new file mode 100644
index 00000000..a1b34807
--- /dev/null
+++ b/web/css/toolkit.css
@@ -0,0 +1,99 @@
+
+.tc-box {
+  position: absolute;
+  margin-left: 0; margin-top: 0;
+  top: 0; left: 0;
+  width : 250px; height: 300px;
+  background-color: #000;
+}
+
+.tc-row {
+  height: 27px;
+  line-height: 27px;
+  overflow: hidden;
+  padding: 0 4px 0 5px;
+  border-bottom: 1px solid #2c2c2c;
+}
+
+.tc-title {
+  padding-left: 16px;
+  background: black url(data:image/gif;base64,R0lGODlhBQAFAJEAAP////Pz8////////yH5BAEAAAIALAAAAAAFAAUAAAIIlI+hKgFxoCgAOw==) 6px 10px no-repeat;
+  cursor: pointer;
+}
+
+.tc-folder {
+  color: #eee;
+  font: 11px 'Lucida Grande', sans-serif;
+  background-color: #1a1a1a;
+}
+
+.tc-ctrl {
+  border-left: 3px solid #e61d5f;
+}
+
+.tc-ctrl-btn {
+  border-left: 3px solid #e61d5f;
+  cursor: pointer;
+}
+
+.tc-ctrl-btn:hover {
+  background-color: #000;
+}
+
+.tc-prop-name {
+  cursor: default;
+  float: left;
+  clear: left;
+  width: 40%;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.tc-prop-value {
+  float: left;
+  width: 60%;
+}
+
+.tc-ctrl input[type=text] {
+    color: #2fa1d6;
+    background: #303030;
+    outline: none;
+    border: 0;
+    margin-top: 4px;
+    padding: 3px;
+    width: 100%;
+    float: right;
+}
+
+.tc-ctrl-text input[type=text] {
+  color:#1ed36f;
+}
+
+.tc-ctrl input[type=text]:focus {
+  color: #eee;
+}
+
+.tc-scroll {
+    overflow-y: auto;
+    overflow-x: hidden;
+}
+
+.tc-scroll::-webkit-scrollbar {
+    width: 2px;
+}
+
+.tc-scroll::-webkit-scrollbar-track {
+    background:#eee;
+    border: thin solid lightgray;
+    box-shadow: 0px 0px 3px #dfdfdf inset;
+    border-radius:10px;
+}
+.tc-scroll::-webkit-scrollbar-thumb {
+    background:#999;
+    border: thin solid gray;
+    border-radius:10px;
+}
+
+.tc-scroll::-webkit-scrollbar-thumb:hover {
+    background:#7d7d7d;
+}
diff --git a/web/index.html b/web/index.html
index 32d18711..ce488e0f 100644
--- a/web/index.html
+++ b/web/index.html
@@ -8,7 +8,10 @@
     overflow: hidden;
     }
   </style>
+  <link rel="stylesheet" href="css/toolkit.css">
 
+
+  <script src="lib/jquery-2.1.0.min.js"></script>
   <script src="lib/three/three.js"></script>
   <script src="lib/three/TrackballControls.js"></script>
   <script src="lib/three/OrbitControls.js"></script>
@@ -24,6 +27,7 @@
   <script src="app/workbench.js"></script>
   <script src="app/math/graph.js"></script>
   <script src="app/3d/hashmap.js"></script>
+  <script src="app/ui/toolkit.js"></script>
 
   <script>window.onload = function() {
     window._TCAD_APP = new TCAD.App();
@@ -32,4 +36,4 @@
 <body>
 
 </body>
-</html>
\ No newline at end of file
+</html>