diff --git a/src/kiri-mode/cam/client.js b/src/kiri-mode/cam/client.js
index bf838143..bd5082ea 100644
--- a/src/kiri-mode/cam/client.js
+++ b/src/kiri-mode/cam/client.js
@@ -1782,8 +1782,8 @@ function updateStock(args, event) {
         camZBottom = undefined;
     }
 
-    API.platform.update_top_z(delta);
-    API.platform.update_origin();
+    // API.platform.update_top_z(delta);
+    // API.platform.update_origin();
     SPACE.update();
 }
 
diff --git a/src/kiri-mode/cam/slice.js b/src/kiri-mode/cam/slice.js
index bfee53e0..c3e51631 100644
--- a/src/kiri-mode/cam/slice.js
+++ b/src/kiri-mode/cam/slice.js
@@ -196,6 +196,9 @@ CAM.slice = function(settings, widget, onupdate, ondone) {
 
     // determing # of steps and step weighting for progress bar
     for (let op of proc.ops.filter(op => !op.disabled)) {
+        if (op.type === '|') {
+            break;
+        }
         let opfn = OPS[op.type];
         if (opfn) {
             let opin = new opfn(state, op);
diff --git a/src/kiri/tools.js b/src/kiri/tools.js
index 2d755847..f0df350a 100644
--- a/src/kiri/tools.js
+++ b/src/kiri/tools.js
@@ -8,6 +8,9 @@ const { Vector3, Quaternion } = THREE;
 const { kiri } = root;
 const { api } = kiri;
 
+const XAXIS = new THREE.Vector3(1,0,0);
+const ZAXIS = new THREE.Vector3(0,0,1);
+
 // circle
 let pgeo = new THREE.CircleGeometry(8, 30);
 let pmat = new THREE.MeshBasicMaterial({color: 0xff0000, opacity: 0.5, transparent: true});
@@ -116,20 +119,17 @@ api.event.on('mouse.hover', (ev) => {
         obj.add(pmesh);
         pmesh.position.x = point.x - opos.x + norm.x * 0.1;
         if (track.indexed) {
-            let delta = track.delta;
             let rad = track.indexRad;
-            let py = (point.y - delta.z + track.tzoff) * 1.001;
-            let pz = (point.z + delta.y) * 1.001;
-            let v = new THREE.Vector3(point.x, py, pz)
-                .applyAxisAngle(new THREE.Vector3(1,0,0), rad);
+            let py = point.y * 1.001;
+            let pz = point.z * 1.001;
+            let v = new THREE.Vector3(point.x, py, pz).applyAxisAngle(XAXIS, rad);
             pmesh.position.y = -v.z;
             pmesh.position.z = v.y;
         } else {
             pmesh.position.y = -point.z - opos.y + norm.y * 0.1;
-            pmesh.position.z = point.y + norm.z * 0.1;
+            pmesh.position.z = point.y + track.tzoff + norm.z * 0.1;
         }
-        let q = new Quaternion().setFromUnitVectors(
-            new Vector3(0,0,1),
+        let q = new Quaternion().setFromUnitVectors(ZAXIS,
             new Vector3(norm.x,norm.y,norm.z)
         );
         pmesh.setRotationFromQuaternion(q);
diff --git a/src/kiri/utils.js b/src/kiri/utils.js
index 7654f231..d75db786 100644
--- a/src/kiri/utils.js
+++ b/src/kiri/utils.js
@@ -92,7 +92,15 @@ function areEqual(o1, o2) {
     return false;
 }
 
+function trackFn(fn, name) {
+    return function() {
+        console.log(name, ...arguments);
+        fn(...arguments);
+    }
+}
+
 exports({
+    trackFn,
     areEqual,
     parseOpt,
     encodeOpt,
diff --git a/src/kiri/widget.js b/src/kiri/widget.js
index fb762856..16bcdae0 100644
--- a/src/kiri/widget.js
+++ b/src/kiri/widget.js
@@ -17,7 +17,7 @@ const { api, driver, utils } = kiri;
 const { util, polygons } = base;
 const { Mesh, newPoint, verticesToPoints } = base;
 const { inRange, time } = util;
-const { avgc } = utils;
+const { avgc, trackFn } = utils;
 
 const solid_opacity = 1.0;
 const groups = [];
@@ -467,7 +467,6 @@ class Widget {
         if (z !== this.track.indexed) {
             this.track.indexed = z;
             this.center(false);
-            // api.platform.update_top_z();
             this._updateMeshPosition();
         }
     }
@@ -488,7 +487,6 @@ class Widget {
     setTopZ(z) {
         let mesh = this.mesh,
             track = this.track,
-            ltop = track.top || 0,
             mbz = mesh.getBoundingBox().max.z;
         if (z) {
             track.top = z;
@@ -497,7 +495,6 @@ class Widget {
         }
         // difference between top of stock/bounds and top of widget (cam mode)
         track.tzoff = mbz - z;
-        this.modified |= (ltop !== z);
         this._updateMeshPosition();
     }
 
@@ -701,9 +698,10 @@ class Widget {
     }
 
     getBoundingBox(refresh) {
-        if (!this.bounds || refresh) {
+        if (!this.bounds || refresh || this.modified) {
             this.bounds = new THREE.Box3();
             this.bounds.setFromPoints(this.getPoints());
+            this.modified = false;
         }
         return this.bounds;
     }
@@ -718,10 +716,6 @@ class Widget {
         return bounds;
     }
 
-    isModified() {
-        return this.modified;
-    }
-
     getExtruder(settings) {
         if (settings) {
             console.trace('legacy call with settings');