diff --git a/src/Scene.js b/src/Scene.js
index 1df6b30..a0baa1e 100644
--- a/src/Scene.js
+++ b/src/Scene.js
@@ -13,7 +13,7 @@ import { extrude } from './extrude'
 import { onHover, onPick } from './utils/mouseEvents';
 import { _vec2, _vec3, color, awaitPts } from './utils/shared'
 import { Vector3 } from 'three/src/Three';
-import {AxesHelper} from './utils/axes'
+import { AxesHelper } from './utils/axes'
 
 import CSG from "./utils/three-csg.js"
 
@@ -152,7 +152,7 @@ export class Scene {
     const entries = state.treeEntries.byNid
     for (let k in entries) {
 
-      if (k[0] == 's') { 
+      if (k[0] == 's') {
 
         entries[k].obj3d = loader.parse(entries[k].obj3d)
         this.obj3d.add(entries[k].obj3d)
@@ -190,32 +190,33 @@ function render() {
 
 async function addSketch() {
 
-  let references = await this.awaitPts(3)
+  let sketch;
 
-  const sketch = new Sketch(this.camera, this.canvas, this.store)
-
-  if (references.length == 1 && references[0].name[0] == 'd') {
-    this.obj3d.add(sketch.obj3d)
-    sketch.obj3d.matrix = references[0].matrix
+  if (this.selected[0].name[0] == 'd') {
+    sketch = new Sketch(this.camera, this.canvas, this.store)
+    sketch.obj3d.matrix = this.selected[0].matrix
     sketch.plane.applyMatrix4(sketch.obj3d.matrix)
     sketch.obj3d.inverse = sketch.obj3d.matrix.clone().invert()
-
-  } else if (references.length == 3) {
-    this.obj3d.add(sketch.obj3d)
+  } else {
+    const references = await this.awaitPts(3);
+    if (references.length != 3) return;
+    sketch = new Sketch(this.camera, this.canvas, this.store)
     sketch.align(
       ...references.map(
         el => new Vector3(...el.geometry.attributes.position.array).applyMatrix4(el.matrixWorld)
       )
     )
-
-  } else {
-    console.log('cancelled')
-    return;
   }
 
+  this.obj3d.add(sketch.obj3d)
+
+
+
   sketch.activate()
+
   sketch.obj3d.addEventListener('change', this.render);
   this.render()
+  console.log('render')
   this.store.dispatch({ type: 'rx-sketch', obj: sketch })
 
 }
diff --git a/src/extrude.js b/src/extrude.js
index 6e6b734..6d6eb91 100644
--- a/src/extrude.js
+++ b/src/extrude.js
@@ -64,7 +64,7 @@ export function extrude(sketch) {
   }
 
 
-  findPair(children[1])
+  findPair(children[3]) //??? need fixing
 
   const shape = new THREE.Shape(v2s);
   const extrudeSettings = { depth: 8, bevelEnabled: false };
diff --git a/src/sketcher/Sketch.js b/src/sketcher/Sketch.js
index 2703fa2..cd17b41 100644
--- a/src/sketcher/Sketch.js
+++ b/src/sketcher/Sketch.js
@@ -9,7 +9,7 @@ import { get3PtArc } from './drawArc'
 import { _vec2, _vec3, raycaster, awaitPts } from '../utils/shared'
 import { replacer, reviver } from '../utils/mapJSONReplacer'
 import { AxesHelper } from '../utils/axes'
-import { drawDimension } from './drawDimension';
+import { drawDimension, _onMoveDimension } from './drawDimension';
 
 
 
@@ -45,11 +45,9 @@ class Sketch {
       this.constraints = new Map()
       this.c_id = 0;
 
-      this.sub = new THREE.Group();
-      this.obj3d.add(this.sub);
-      const axesHelper = new AxesHelper(2);
-      this.sub.add(axesHelper);
-
+      this.obj3d.add(new THREE.Group().add(new AxesHelper(2)));
+      this.obj3d.add(new THREE.Group());
+      this.obj3d.add(new THREE.Group());
     } else {
 
 
@@ -108,6 +106,7 @@ class Sketch {
     this.drawPreClick2 = drawPreClick2.bind(this);
     this.drawOnClick2 = drawOnClick2.bind(this);
     this.drawDimension = drawDimension.bind(this)
+    this._onMoveDimension = _onMoveDimension.bind(this)
 
     this.awaitPts = awaitPts.bind(this);
 
@@ -117,6 +116,7 @@ class Sketch {
     this.onRelease = onRelease.bind(this);
     this.onKeyPress = this.onKeyPress.bind(this);
 
+
   }
 
 
@@ -335,11 +335,11 @@ class Sketch {
 
     /*
     - loop to update all the children that are points
-    - we skip first triplet because it refers to a non-geometry child
+    - why +6?  we skip first two triplets because it refers to a non-geometry children
     - we also sneak in updating lines children as well, by checking when ptsBuf[ptr] is NaN
     */
 
-    for (let i = 1, ptr = (pts_buffer >> 2) + 3; i < this.obj3d.children.length; i += 1, ptr += 3) {
+    for (let i = 3, ptr = (pts_buffer >> 2) + 9; i < this.obj3d.children.length; i += 1, ptr += 3) {
       // for (let i = 0, ptr = (pts_buffer >> 2) + 3; i < this.obj3d.children.length; i += 1, ptr += 3) {
 
       const pos = this.obj3d.children[i].geometry.attributes.position;
diff --git a/src/sketcher/drawDimension.js b/src/sketcher/drawDimension.js
index 66fc915..22b7bfc 100644
--- a/src/sketcher/drawDimension.js
+++ b/src/sketcher/drawDimension.js
@@ -17,9 +17,6 @@ export async function drawDimension() {
 
   if (pts.length != 2) return;
 
-
-
-
   const line = new THREE.LineSegments(
     new THREE.BufferGeometry().setAttribute('position',
       new THREE.Float32BufferAttribute(3 * 8, 3)
@@ -34,21 +31,72 @@ export async function drawDimension() {
     pointMaterial.clone()
   )
 
-  const group = this.obj3d.children[0]
-  group.add(line)
-  group.add(point)
+  line.userData.construction = true
+  point.userData.construction = true
+
+  const groupLines = this.obj3d.children[1]
+  const groupPts = this.obj3d.children[2]
+  groupLines.add(line)
+  groupPts.add(point)
+
+  const onMove = this._onMoveDimension(...pts, point, line)
+
+  let onEnd, onKey;
+
+  let add = await new Promise((res) => {
+    onEnd = (e) => res(true)
+    onKey = (e) => e.key == 'Escape' && res(false)
+
+    this.canvas.addEventListener('pointermove', onMove)
+    this.canvas.addEventListener('pointerdown', onEnd)
+    window.addEventListener('keydown', onKey)
+  })
+
+  this.canvas.removeEventListener('pointermove', onMove)
+  this.canvas.removeEventListener('pointerdown', onEnd)
+  window.removeEventListener('keydown', onKey)
+
+  if (add) {
+    this.constraints.set(++this.c_id, //???
+      [
+        'pt_pt_distance', 10,
+        [pts[0].name, pts[1].name, -1, -1]
+      ]
+    )
+    pts[0].userData.constraints.push(this.c_id)
+    pts[1].userData.constraints.push(this.c_id)
+
+    this.updateOtherBuffers()
+
+    line.name = this.c_id
+    point.name = this.c_id
+
+  } else {
+
+    [groupLines.splice(groupLines.length - 1),
+    groupPts.splice(groupLines.length - 1)].forEach(
+      e => {
+        e.geometry.dispose()
+        e.material.dispose()
+      }
+    )
+    sc.render()
+  }
 
 
+
+  return
+}
+
+
+export function _onMoveDimension(_p1, _p2, point, line) {
+
+  const p1 = new THREE.Vector2(..._p1.geometry.attributes.position.array.slice(0, 2))
+  const p2 = new THREE.Vector2(..._p2.geometry.attributes.position.array.slice(0, 2))
+  const p3 = new THREE.Vector2()
   let dir, hyp, proj, perp, p1e, p2e, loc;
 
-  const p1 = new THREE.Vector2(...pts[0].geometry.attributes.position.array.slice(0, 2))
-  const p2 = new THREE.Vector2(...pts[1].geometry.attributes.position.array.slice(0, 2))
-  const p3 = new THREE.Vector2()
-  
-  const onMove = (e) => {
-
-
-
+  return (e) => {
     loc = this.getLocation(e)
     p3.set(loc.x, loc.y)
 
@@ -60,7 +108,7 @@ export async function drawDimension() {
     p1e = p1.clone().add(perp).toArray()
     p2e = p2.clone().add(perp).toArray()
 
-    const linegeom = line.geometry.attributes.position.array 
+    const linegeom = line.geometry.attributes.position.array
     linegeom.set(p1.toArray(), 0)
     linegeom.set(p1e, 3)
 
@@ -79,54 +127,4 @@ export async function drawDimension() {
     point.geometry.attributes.position.needsUpdate = true;
     sc.render()
   }
-
-  let onEnd, onKey;
-
-  let add = await new Promise((res) => {
-    onEnd = (e) => {
-      res(true)
-      this.updateOtherBuffers()
-    }
-    onKey = (e) => {
-      if (e.key == 'Escape') res(false)
-    }
-    this.canvas.addEventListener('pointermove', onMove)
-    this.canvas.addEventListener('pointerdown', onEnd)
-    window.addEventListener('keydown', onKey)
-  })
-
-  this.canvas.removeEventListener('pointermove', onMove)
-  this.canvas.removeEventListener('pointerdown', onEnd)
-  this.canvas.removeEventListener('keydown', onKey)
-
-  if (add) {
-    this.constraints.set(++this.c_id, //???
-      [
-        'pt_pt_distance', 10,
-        [pts[0].name, pts[1].name, -1, -1]
-      ]
-    )
-    pts[0].userData.constraints.push(this.c_id)
-    pts[1].userData.constraints.push(this.c_id)
-    
-    this.updateOtherBuffers()
-
-    line.name = this.c_id
-    point.name = this.c_id
-
-  } else {
-
-    group.children.splice(group.children.length - 2).forEach(
-      e => {
-        e.geometry.dispose()
-        e.material.dispose()
-      }
-    )
-    sc.render()
-  }
-
-
-
-  return
-}
-
+}
\ No newline at end of file
diff --git a/src/utils/shared.js b/src/utils/shared.js
index 0b4bdd9..70bf3c2 100644
--- a/src/utils/shared.js
+++ b/src/utils/shared.js
@@ -58,7 +58,6 @@ const lineObj = (n = 1) => {
 
 async function awaitPts(n) {
   let references = this.selected.slice()
-
   let end = false;
   while (references.length < n && !end) {
     let pt;
@@ -68,16 +67,13 @@ async function awaitPts(n) {
         onKey = (e) => e.key == 'Escape' && rej()
         onEnd = (e) => res(this.hovered[0])
 
-        this.canvas.addEventListener('pointerdown', onEnd)
-        window.addEventListener('keydown', onKey)
+        this.canvas.addEventListener('pointerdown', onEnd,{ once: true })
+        window.addEventListener('keydown', onKey,{ once: true })
       })
 
       if (pt.name[0] == 'p') {
         references.push(pt)
-      } else if (pt.name[0] == 'd') {
-        references = [pt]
-        end = true;
-      }
+      } 
 
     } catch (e) {
       end = true;