diff --git a/web/app/cad/actions/operationActions.js b/web/app/cad/actions/operationActions.js
index 392e8de3..7270c7bb 100644
--- a/web/app/cad/actions/operationActions.js
+++ b/web/app/cad/actions/operationActions.js
@@ -9,12 +9,6 @@ const OPERATION_ACTIONS = [
     },
     ...requiresFaceSelection(1)
   },
-  {
-    id: 'EXTRUDE',
-    appearance: {
-      info: 'extrudes 2D sketch',
-    },
-  },
   {
     id: 'REVOLVE',
     appearance: {
diff --git a/web/app/cad/craft/brep/boolean-operation.js b/web/app/cad/craft/booleanOperation.js
similarity index 75%
rename from web/app/cad/craft/brep/boolean-operation.js
rename to web/app/cad/craft/booleanOperation.js
index 8dd015ae..53a8b617 100644
--- a/web/app/cad/craft/brep/boolean-operation.js
+++ b/web/app/cad/craft/booleanOperation.js
@@ -1,8 +1,8 @@
-import {subtract, union, intersect} from '../../../brep/operations/boolean'
-import {BREPSceneSolid} from '../../scene/wrappers/brepSceneObject'
-import {update as updateStitching} from '../../../brep/stitching'
-import {BREPValidator} from '../../../brep/brep-validator'
-import {Shell} from '../../../brep/topo/shell'
+import {subtract, union, intersect} from '../../brep/operations/boolean'
+import {BREPSceneSolid} from '../scene/wrappers/brepSceneObject'
+import {update as updateStitching} from '../../brep/stitching'
+import {BREPValidator} from '../../brep/brep-validator'
+import {Shell} from '../../brep/topo/shell'
 
 const BoolOpMap = {
   'subtract': subtract,
diff --git a/web/app/cad/craft/craftPlugin.js b/web/app/cad/craft/craftPlugin.js
index bba73268..d4122e24 100644
--- a/web/app/cad/craft/craftPlugin.js
+++ b/web/app/cad/craft/craftPlugin.js
@@ -43,7 +43,7 @@ export function activate({bus, services}) {
 
     let result;
     try {
-      result = op.run(services.cadRegistry.registry, request.params);
+      result = op.run(services.cadRegistry, request.params);
     } catch (err) {
       return err;
     }
diff --git a/web/app/cad/craft/brep/cut-extrude.js b/web/app/cad/craft/cutExtrude/cutExtrude.js
similarity index 60%
rename from web/app/cad/craft/brep/cut-extrude.js
rename to web/app/cad/craft/cutExtrude/cutExtrude.js
index e371eafa..b50d91a0 100644
--- a/web/app/cad/craft/brep/cut-extrude.js
+++ b/web/app/cad/craft/cutExtrude/cutExtrude.js
@@ -1,33 +1,22 @@
-import {Matrix3, BasisForPlane, ORIGIN} from '../../../math/l3space'
+import {Matrix3, ORIGIN} from '../../../math/l3space'
 import * as math from '../../../math/math'
-import Vector from 'math/vector';
-import {enclose, iterateSegments} from '../../../brep/brep-enclose'
-import * as stitching from '../../../brep/stitching'
-import {Loop} from '../../../brep/topo/loop'
-import {incRefCounter} from '../../../brep/topo/topo-object'
-import {Line} from '../../../brep/geom/impl/line'
-import {ReadSketchFromFace} from '../../sketch/sketchReader'
-import {Segment} from '../../sketch/sketchModel'
-import {isCurveClass} from '../../cad-utils'
-import {BooleanOperation, combineShells} from './boolean-operation'
+import {enclose} from '../../../brep/brep-enclose'
+import {BooleanOperation, combineShells} from '../booleanOperation'
 
 
-export function Extrude(app, params) {
-  return doOperation(app, params, false);
+export function Extrude(cadRegistry, params) {
+  return doOperation(cadRegistry, params, false);
 }
 
-export function Cut(app, params) {
-  return doOperation(app, params, true);
+export function Cut(cadRegistry, params) {
+  return doOperation(cadRegistry, params, true);
 }
 
-export function doOperation(app, params, cut) {
-  const face = app.findFace(params.face);
+export function doOperation(cadRegistry, params, cut) {
+  const face = cadRegistry.findFace(params.face);
   const solid = face.solid;
 
-  const savedFace = localStorage.getItem(app.faceStorageKey(face.id));
-  if (savedFace == null) return null;
-
-  const sketch = ReadSketchFromFace(app, face);
+  const sketch = face.sketch;
   let plane = face.surface().tangentPlane(0, 0);
   const details = getEncloseDetails(params, sketch.fetchContours(), plane, !cut, false);
   const operand = combineShells(details.map(d => enclose(d.basePath, d.lidPath, d.baseSurface, d.lidSurface)));
@@ -49,10 +38,10 @@ export function getEncloseDetails(params, contours, sketchSurface, invert) {
 
   const targetDir = baseSurfaceNormal.negate();
 
-  if (params.rotation != 0) {
+  if (params.rotation !== 0) {
     const basis = sketchSurface.basis();
     target = Matrix3.rotateMatrix(params.rotation * Math.PI / 180, basis[0], ORIGIN).apply(targetDir);
-    if (params.angle != 0) {
+    if (params.angle !== 0) {
       target = Matrix3.rotateMatrix(params.angle * Math.PI / 180, basis[2], ORIGIN)._apply(target);
     }
     target._multiply(value);
@@ -67,7 +56,7 @@ export function getEncloseDetails(params, contours, sketchSurface, invert) {
     if (invert) contour.reverse();
 
     const lidPath = [];
-    var applyPrism = !math.equal(params.prism, 1);   
+    let applyPrism = !math.equal(params.prism, 1);   
     for (let i = 0; i < basePath.length; ++i) {
       const curve = basePath[i];
       let lidCurve = curve.translate(target);
diff --git a/web/app/cad/craft/cutExtrude/extrudeOperation.js b/web/app/cad/craft/cutExtrude/extrudeOperation.js
new file mode 100644
index 00000000..b204d648
--- /dev/null
+++ b/web/app/cad/craft/cutExtrude/extrudeOperation.js
@@ -0,0 +1,16 @@
+import {roundValueForPresentation as r} from "../operationHelper";
+import {createWizardMetadata} from "./wizardMetadata";
+import {createPreviewGeomProvider} from "./previewer";
+import {Extrude} from "./cutExtrude";
+
+export default {
+  id: 'EXTRUDE',
+  metadata: createWizardMetadata('height'),
+  label: 'Extrude',
+  icon: 'img/cad/extrude',
+  info: 'extrudes 2D sketch',
+  paramsInfo:  value => `(${r(value)})`,
+  previewGeomProvider: createPreviewGeomProvider(false),
+  run: Extrude
+};
+
diff --git a/web/app/cad/craft/cutExtrude/previewer.js b/web/app/cad/craft/cutExtrude/previewer.js
new file mode 100644
index 00000000..7150f02e
--- /dev/null
+++ b/web/app/cad/craft/cutExtrude/previewer.js
@@ -0,0 +1,53 @@
+
+import {getEncloseDetails} from "./cutExtrude";
+import {curveTessParams} from "../../../brep/geom/impl/curve/curve-tess";
+import Vector from "../../../../../modules/math/vector";
+import {TriangulatePolygons} from "../../tess/triangulation";
+import {createMeshGeometry} from "../../../../../modules/scene/geoms";
+
+
+export function createPreviewGeomProvider(inversed) {
+  
+  return function previewGeomProvider(params, services) {
+
+    const face = services.cadRegistry.findFace(params.face);
+    if (!face) return null;
+    let sketch = face.sketch.fetchContours();
+
+    const encloseDetails = getEncloseDetails(params, sketch, face.surface().tangentPlane(0, 0), !inversed);
+    const triangles = [];
+
+    for (let {basePath, lidPath, baseSurface, lidSurface} of encloseDetails) {
+      const basePoints = [];
+      const lidPoints = [];
+      for (let i = 0; i < basePath.length; ++i) {
+        let baseNurbs = basePath[i];
+        let lidNurbs = lidPath[i];
+
+        let tessCurve = params.prism > 1 ? lidNurbs : baseNurbs;
+
+        const us = curveTessParams(tessCurve.impl, tessCurve.uMin, tessCurve.uMax);
+        const base = us.map(u => baseNurbs.point(u));
+        const lid = us.map(u => lidNurbs.point(u));
+        const n = base.length;
+        for (let p = n - 1, q = 0; q < n; p = q++) {
+          triangles.push([base[p], base[q], lid[q]]);
+          triangles.push([lid[q], lid[p], base[p]]);
+        }
+        base.forEach(p => basePoints.push(p));
+        lid.forEach(p => lidPoints.push(p));
+      }
+
+      function collectOnSurface(points, normal) {
+        TriangulatePolygons([points], normal, (v) => v.toArray(), (arr) => new Vector().set3(arr))
+          .forEach(tr => triangles.push(tr));
+      }
+
+      collectOnSurface(basePoints, baseSurface.normal);
+      collectOnSurface(lidPoints, lidSurface.normal);
+    }
+
+    return createMeshGeometry(triangles);
+  }
+}
+
diff --git a/web/app/cad/craft/cutExtrude/wizardMetadata.js b/web/app/cad/craft/cutExtrude/wizardMetadata.js
new file mode 100644
index 00000000..d9d8276e
--- /dev/null
+++ b/web/app/cad/craft/cutExtrude/wizardMetadata.js
@@ -0,0 +1,11 @@
+import {CURRENT_SELECTION as S} from "../wizard/wizardPlugin";
+
+export function createWizardMetadata(valueLabel) {
+  return [
+    ['value'   , 'number',  50,  {label: valueLabel}], 
+    ['prism'   , 'number',  1 ,  {min: 0, step: 0.1, round: 1}],
+    ['angle'   , 'number',  0 ,  {}],
+    ['rotation', 'number',  0 ,  {step: 5}],
+    ['face'    , 'face'  ,  S  ]
+  ];
+}
\ No newline at end of file
diff --git a/web/app/cad/craft/operationHelper.js b/web/app/cad/craft/operationHelper.js
new file mode 100644
index 00000000..c547e9b6
--- /dev/null
+++ b/web/app/cad/craft/operationHelper.js
@@ -0,0 +1,4 @@
+
+export function roundValueForPresentation(value) {
+  return value.toPrecision(4).replace(/\.0$/, '');
+}
diff --git a/web/app/cad/craft/primitives/boxOperation.js b/web/app/cad/craft/primitives/boxOperation.js
index 9a3539c4..e7fa32e7 100644
--- a/web/app/cad/craft/primitives/boxOperation.js
+++ b/web/app/cad/craft/primitives/boxOperation.js
@@ -9,7 +9,7 @@ const METADATA = [
   ['depth'   , 'number',  500,  {min: 0}]
 ];
 
-function createBox(solids, {width, height, depth}) {
+function createBox(cadRegistry, {width, height, depth}) {
   return {
     outdated: [],
     created: [new BREPSceneSolid(box(width, height, depth))]
@@ -20,9 +20,10 @@ export default {
   id: 'BOX',
   metadata: METADATA,
   label: 'Box',
+  icon: 'img/cad/box',
   info: 'creates new object box',
   paramsInfo: ({width, height, depth}) => `(${width}, ${height}, ${depth})`,
-  previewer: createPreviewer(({width, height, depth}) => createBoxGeometry(width, height, depth)),
+  previewGeomProvider: ({width, height, depth}) => createBoxGeometry(width, height, depth),
   run: createBox
 };
 
diff --git a/web/app/cad/craft/wizard/wizardPlugin.js b/web/app/cad/craft/wizard/wizardPlugin.js
index 51853294..ebd5633f 100644
--- a/web/app/cad/craft/wizard/wizardPlugin.js
+++ b/web/app/cad/craft/wizard/wizardPlugin.js
@@ -23,4 +23,6 @@ export const TOKENS = {
   WIZARDS: createToken('wizards'),
   OPEN: createToken('wizards', 'open'),
   CLOSE: createToken('wizards', 'close'),
-};
\ No newline at end of file
+};
+
+export const CURRENT_SELECTION = {};
diff --git a/web/app/cad/dom/components/wizard/FaceSelectionControl.jsx b/web/app/cad/dom/components/wizard/FaceSelectionControl.jsx
new file mode 100644
index 00000000..669c30ae
--- /dev/null
+++ b/web/app/cad/dom/components/wizard/FaceSelectionControl.jsx
@@ -0,0 +1,8 @@
+import React from 'react';
+
+import TextControl from "../../../../../../modules/ui/components/controls/TextControl";
+
+export default function FaceSelectionControl(props) {
+  return <TextControl {...props} />
+}
+
diff --git a/web/app/cad/dom/components/wizard/Wizard.jsx b/web/app/cad/dom/components/wizard/Wizard.jsx
index 44a99d01..ce6dd2b6 100644
--- a/web/app/cad/dom/components/wizard/Wizard.jsx
+++ b/web/app/cad/dom/components/wizard/Wizard.jsx
@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import Window from 'ui/components/Window';
 import Stack from 'ui/components/Stack';
 import Field from 'ui/components/controls/Field';
@@ -8,14 +9,22 @@ import NumberControl from 'ui/components/controls/NumberControl';
 import TextControl from 'ui/components/controls/TextControl';
 import Button from 'ui/components/controls/Button';
 import ButtonGroup from 'ui/components/controls/ButtonGroup';
+import FaceSelectionControl from './FaceSelectionControl';
+import {CURRENT_SELECTION} from "../../../craft/wizard/wizardPlugin";
 
 export default class Wizard extends React.Component {
   
-  constructor({initialState, metadata, previewer}) {
+  constructor({initialState, metadata, previewer}, {services: {selection}}) {
     super();
     this.params = {};
 
-    metadata.forEach(([name,, v]) => this.params[name] = v);
+    metadata.forEach(([name, type, v]) => {
+      if (type === 'face' && v === CURRENT_SELECTION) {
+        let selectedFace = selection.face()[0];
+        v = selectedFace ? selectedFace.id : '';
+      }
+      this.params[name] = v
+    });
     
     Object.assign(this.params, initialState);
     
@@ -68,10 +77,17 @@ export default class Wizard extends React.Component {
     };
     if (type === 'number') {
       return <NumberControl {...commonProps} />
+    } else if (type === 'face') {
+      return <FaceSelectionControl {...commonProps} />
     } else {
       return <TextControl {...commonProps} />
     }
   }
+  
+  static contextTypes = {
+    services: PropTypes.object
+  };
+
 }
 
 
diff --git a/web/app/cad/dom/components/wizard/WizardManager.jsx b/web/app/cad/dom/components/wizard/WizardManager.jsx
index a78c534e..413b75ad 100644
--- a/web/app/cad/dom/components/wizard/WizardManager.jsx
+++ b/web/app/cad/dom/components/wizard/WizardManager.jsx
@@ -3,17 +3,18 @@ import PropTypes from 'prop-types';
 import {TOKENS as WIZARD_TOKENS} from '../../../craft/wizard/wizardPlugin';
 import connect from 'ui/connect';
 import Wizard from "./Wizard";
+import {createPreviewer} from "../../../preview/scenePreviewer";
 
 function WizardManager({wizards, close}, {services}) {
   return wizards.map( ({type, initialState}, wizardIndex) => {
-    let {metadata, previewer, run} = services.operation.get(type);
+    let {metadata, previewGeomProvider, run} = services.operation.get(type);
     
     function onOK(params) {
       close();
       services.craft.modify({type, params});
     }
     
-    previewer = previewer.bind(null, {services});
+    let previewer = createPreviewer(previewGeomProvider, {services});
     return <Wizard key={wizardIndex} previewer={previewer} metadata={metadata}
                    onOK={onOK}
                    onCancel={close}
diff --git a/web/app/cad/part/partOperationsPlugin.js b/web/app/cad/part/partOperationsPlugin.js
index 896f2272..940d5b61 100644
--- a/web/app/cad/part/partOperationsPlugin.js
+++ b/web/app/cad/part/partOperationsPlugin.js
@@ -1,7 +1,9 @@
 import boxOperation from '../craft/primitives/boxOperation';
+import extrudeOperation from '../craft/cutExtrude/extrudeOperation';
 
-export function activate({bus, services}) {
+export function activate({services}) {
   services.operation.registerOperations([
-    boxOperation
+    boxOperation, 
+    extrudeOperation
   ])
 }
\ No newline at end of file
diff --git a/web/app/cad/preview/scenePreviewer.js b/web/app/cad/preview/scenePreviewer.js
index 4aa47f47..1d91a7c6 100644
--- a/web/app/cad/preview/scenePreviewer.js
+++ b/web/app/cad/preview/scenePreviewer.js
@@ -3,9 +3,9 @@ import {createTransparentPhongMaterial} from 'scene/materials';
 import {createMesh} from 'scene/objects/mesh';
 
 
-export function createPreviewer(sceneGeometryCreator) {
+export function createPreviewer(sceneGeometryCreator, {services}) {
 
-  return function({services}, initParams) {
+  return function(params) {
     const previewGroup = SceneGraph.createGroup();
     SceneGraph.addToGroup(services.cadScene.workGroup, previewGroup);
     
@@ -21,7 +21,7 @@ export function createPreviewer(sceneGeometryCreator) {
 
     function update(params) {
       destroyPreviewObject();
-      previewObject = createMesh(sceneGeometryCreator(params), IMAGINARY_SURFACE_MATERIAL);
+      previewObject = createMesh(sceneGeometryCreator(params, services), IMAGINARY_SURFACE_MATERIAL);
       previewGroup.add(previewObject);
       services.viewer.render();
     }
@@ -31,19 +31,19 @@ export function createPreviewer(sceneGeometryCreator) {
       SceneGraph.removeFromGroup(services.cadScene.workGroup, previewGroup);
       services.viewer.render();
     }
-    update(initParams);
+    update(params);
     
     return {update, dispose};
   }
 }
 
 
-// function sketchBasedPreviewCreator(params) {
-//   const face = app.findFace(params.face);
-//   if (!face) return null;
-//   const triangles = this.createImpl(app, params, face.sketch.fetchContours(), face);
-//   return createMeshFromTriangles(triangles, IMAGINARY_SURFACE_MATERIAL);
-// }
+function sketchBasedPreviewCreator(params) {
+  const face = app.findFace(params.face);
+  if (!face) return null;
+  const triangles = this.createImpl(app, params, face.sketch.fetchContours(), face);
+  return createMeshFromTriangles(triangles, IMAGINARY_SURFACE_MATERIAL);
+}
 //
 // function sketchBasedNurbsPreviewCreator(params) {
 //   const face = app.findFace(params.face);