diff --git a/modules/math/vector.js b/modules/math/vector.js
index c8cf55fe..2314f5b4 100644
--- a/modules/math/vector.js
+++ b/modules/math/vector.js
@@ -114,7 +114,11 @@ export default class Vector {
   };
 
   cross(a) {
-    return new Vector(
+    return this.copy()._cross(a);
+  };
+
+  _cross(a) {
+    return this.set(
       this.y * a.z - this.z * a.y,
       this.z * a.x - this.x * a.z,
       this.x * a.y - this.y * a.x
@@ -129,6 +133,10 @@ export default class Vector {
     return this._multiply(-1);
   }
 
+  _perpXY() {
+    return this.set(-this.y, this.x, this.z);
+  }
+
   toArray() {
     return [this.x, this.y, this.z];
   }
diff --git a/web/app/cad/actions/coreActions.js b/web/app/cad/actions/coreActions.js
index 751102e8..aad54724 100644
--- a/web/app/cad/actions/coreActions.js
+++ b/web/app/cad/actions/coreActions.js
@@ -14,6 +14,19 @@ export default [
     invoke: ({services}) => services.sketcher.sketchFace(services.selection.face.single)
   },
 
+  {
+    id: 'ReassignSketch',
+    appearance: {
+      cssIcons: ['share'],
+      label: 'reassign sketch',
+      icon96: 'img/cad/face-edit96.png',
+      info: 'open sketcher for a face/plane',
+    },
+    listens: streams => streams.selection.face,
+    update: ActionHelpers.checkForSelectedFaces(1),
+    invoke: ctx => ctx.services.sketcher.reassignSketchMode.enter(ctx.services.selection.face.single.id)
+  },
+
   {
     id: 'Save',
     appearance: {
diff --git a/web/app/cad/part/menuConfig.js b/web/app/cad/part/menuConfig.js
index ee9515de..f9470840 100644
--- a/web/app/cad/part/menuConfig.js
+++ b/web/app/cad/part/menuConfig.js
@@ -8,7 +8,7 @@ export default [
     id: 'craft',
     cssIcons: ['magic'],
     info: 'set of available craft operations on a solid',
-    actions: ['EXTRUDE', 'CUT', 'REVOLVE', 'SHELL', 'FILLET', 'DATUM_CREATE']
+    actions: ['EXTRUDE', 'CUT', 'REVOLVE', 'SHELL', 'FILLET', 'DATUM_CREATE', 'ReassignSketch']
   },
   {
     id: 'primitives',
diff --git a/web/app/cad/sketch/reassignSketchMode.js b/web/app/cad/sketch/reassignSketchMode.js
new file mode 100644
index 00000000..026ae6dc
--- /dev/null
+++ b/web/app/cad/sketch/reassignSketchMode.js
@@ -0,0 +1,43 @@
+import React from 'react';
+import mapContext from '../../../../modules/ui/mapContext';
+import Button from '../../../../modules/ui/components/controls/Button';
+
+export default function initReassignSketchMode(ctx) {
+  ctx.services.ui.registerComponent('ReassignSketchTool', ReassignSketchTool);
+
+
+  let detach = null;
+  
+  function exit() {
+    ctx.streams.ui.sockets.headsUpHelper.next(null);
+    if (detach) {
+      detach();
+      detach = null;
+    }
+  }
+
+  function enter(fromId) {
+    ctx.streams.ui.sockets.headsUpHelper.next('ReassignSketchTool');
+    detach = ctx.streams.selection.face.attach(faces => {
+      let face = faces[0];
+      if (face && face !== fromId) {
+        exit();
+        ctx.services.sketcher.reassignSketch(fromId, face);
+      }
+    });
+  }
+  return {enter, exit};
+}
+
+function ReassignSketchTool({from, cancel}) {
+  return <div style={{
+    margin: 10
+  }}>
+    Reassign sketch from {from}. Pick a target face. <Button onClick={cancel}>cancel</Button>
+  </div>;
+}
+
+ReassignSketchTool = mapContext(ctx => ({
+  from: ctx.services.selection.face.single.id,
+  cancel: ctx.services.sketcher.reassignSketchMode.exit
+}))(ReassignSketchTool);
diff --git a/web/app/cad/sketch/sketchReader.js b/web/app/cad/sketch/sketchReader.js
index 9251aad6..ee9f422b 100644
--- a/web/app/cad/sketch/sketchReader.js
+++ b/web/app/cad/sketch/sketchReader.js
@@ -124,7 +124,9 @@ export function FetchContours(geom) {
     contours.push(contour);
   }
   for (let contour of contours) {
-    if (!contour.isCCW()) contour.reverse();
+    if (!contour.isCCW()) {
+      contour.reverse();
+    }
   }
   return contours;
 }
diff --git a/web/app/cad/sketch/sketcherPlugin.js b/web/app/cad/sketch/sketcherPlugin.js
index 9abd871d..d96f5af5 100644
--- a/web/app/cad/sketch/sketcherPlugin.js
+++ b/web/app/cad/sketch/sketcherPlugin.js
@@ -2,8 +2,8 @@ import {ReadSketch} from './sketchReader';
 import {getSketchBoundaries} from './sketchBoundaries';
 import {state, stream} from 'lstream';
 import {InPlaceSketcher} from './inPlaceSketcher';
-import {CAMERA_MODE} from '../scene/viewer';
 import sketcherUIContrib from './sketcherUIContrib';
+import initReassignSketchMode from './reassignSketchMode';
 
 export function activate(ctx) {
   
@@ -23,10 +23,8 @@ export function activate(ctx) {
     if (evt.key.indexOf(prefix) < 0) return;
     let sketchFaceId = evt.key.substring(prefix.length);
     let sketchFace = services.cadRegistry.findFace(sketchFaceId);
-    if (sketchFace !== null) {
-      updateSketchForFace(sketchFace);
-      services.viewer.requestRender();
-    }
+    updateSketchForFace(sketchFace);
+    services.viewer.requestRender();
   };
   
   services.storage.addListener(onSketchUpdate);
@@ -38,21 +36,43 @@ export function activate(ctx) {
     }));
   }
 
-  function readSketch(sketchId) {
+  function getSketchData(sketchId) {
     let sketchStorageKey = services.project.sketchStorageKey(sketchId);
-    let savedSketch = services.storage.get(sketchStorageKey);
+    return services.storage.get(sketchStorageKey);
+  }
+  
+  function setSketchData(sketchId, data) {
+    let sketchStorageKey = services.project.sketchStorageKey(sketchId);
+    return services.storage.set(sketchStorageKey, data);
+  }
+
+  function removeSketchData(sketchId) {
+    let sketchStorageKey = services.project.sketchStorageKey(sketchId);
+    return services.storage.remove(sketchStorageKey);
+  }
+
+  function readSketch(sketchId) {
+    let savedSketch = getSketchData(sketchId);
     if (savedSketch === null) {
       return null;
     }
-    return ReadSketch(JSON.parse(savedSketch), sketchId, true);
+    try {
+      return ReadSketch(JSON.parse(savedSketch), sketchId, true);  
+    } catch (e) {
+      console.error(e);
+      return null;
+    }
   }
-  
+
+  function hasSketch(sketchId) {
+    let sketchStorageKey = services.project.sketchStorageKey(sketchId);
+    return !!services.storage.get(sketchStorageKey);
+  }
+
   function updateSketchForFace(mFace) {
     let sketch = readSketch(mFace.id);
-    if (sketch !== null) {
-      mFace.setSketch(sketch);
-      streams.sketcher.update.next(mFace);
-    }
+    mFace.setSketch(sketch);
+    streams.sketcher.update.next(mFace);
   }
 
   function updateAllSketches() {
@@ -88,9 +108,22 @@ export function activate(ctx) {
     services.appTabs.show(face.id, 'Sketch ' + face.id, 'sketcher.html#' + sketchURL);
   }
   
+  function reassignSketch(fromId, toId) {
+    let sketchData = getSketchData(fromId);
+    if (!sketchData) {
+      return;
+    }
+    setSketchData(toId, sketchData);
+    removeSketchData(fromId);
+    updateSketchForFace(services.cadRegistry.findFace(fromId));
+    updateSketchForFace(services.cadRegistry.findFace(toId));
+    services.viewer.requestRender();
+  }
+  
   streams.craft.models.attach(updateAllSketches);
   
   services.sketcher = {
-    sketchFace, sketchFace2D, updateAllSketches, getAllSketches, readSketch, inPlaceEditor
+    sketchFace, sketchFace2D, updateAllSketches, getAllSketches, readSketch, hasSketch, inPlaceEditor, reassignSketch,
+    reassignSketchMode: initReassignSketchMode(ctx)
   }
 }
diff --git a/web/app/cad/storagePlugin.js b/web/app/cad/storagePlugin.js
index fc9129ab..3e9bc637 100644
--- a/web/app/cad/storagePlugin.js
+++ b/web/app/cad/storagePlugin.js
@@ -8,7 +8,11 @@ export function activate({services}) {
   function get(key) {
     return localStorage.getItem(key);
   }
-  
+
+  function remove(key) {
+    return localStorage.removeItem(key);
+  }
+
   function getAllKeysFromNamespace(namespace) {
     let keys = [];
     for(let i = localStorage.length - 1; i >= 0 ; i--) {
@@ -25,6 +29,6 @@ export function activate({services}) {
   }
 
   services.storage = {
-    set, get, addListener, getAllKeysFromNamespace
+    set, get, remove, addListener, getAllKeysFromNamespace
   }
 }