diff --git a/src/mesh/group.js b/src/mesh/group.js
index 33d50d40..7ab4cc2e 100644
--- a/src/mesh/group.js
+++ b/src/mesh/group.js
@@ -109,6 +109,19 @@ mesh.group = class MeshGroup extends mesh.object {
         return this;
     }
 
+    xrotate(x = 0, y = 0, z = 0) {
+        console.log('group rotate', ...arguments);
+        // super.rotate(...arguments);
+        for (let model of this.models) {
+            worker.model_rotate({ id: model.id, x, y, z });
+        }
+        setTimeout(() => {
+            for (let model of this.models) {
+                model.attributes.position.needsUpdate = true;
+            }
+        }, 250);
+    }
+
     scale(x = 1, y = 1, z = 1) {
         for (let m of this.models) {
             m.scale(x, y, z);
diff --git a/src/mesh/model.js b/src/mesh/model.js
index 02441261..f1d4b0d0 100644
--- a/src/mesh/model.js
+++ b/src/mesh/model.js
@@ -166,6 +166,11 @@ mesh.model = class MeshModel extends mesh.object {
         }
     }
 
+    rotate(x = 0, y = 0, z = 0) {
+        console.log('model rotate', ...arguments);
+        super.rotate(...arguments);
+    }
+
     // override and translate mesh
     move(x = 0, y = 0, z = 0) {
         let attr = this.attributes;
@@ -207,7 +212,7 @@ mesh.model = class MeshModel extends mesh.object {
             opt: { mirror: opt.mirror }
         }).then(data => {
             if (opt.append) data = [...data, ...opt.append].toFloat32();
-            if (opt.reload) return this.reload(data);
+            if (opt.x) return this.reload(data);
             let model = new mesh.model({ file: `${this.file}`, mesh: data });
             let group = opt.group || mesh.api.group.new();
             group.add(model);
@@ -251,8 +256,11 @@ mesh.model = class MeshModel extends mesh.object {
     }
 
     load(vertices) {
+        let shared = mesh.util.toSharedF32(vertices);
+        let local = mesh.util.toLocal32(vertices);
+        console.log('load', { vertices, local, shared });
         let geo = new BufferGeometry();
-        geo.setAttribute('position', new BufferAttribute(vertices, 3));
+        geo.setAttribute('position', new BufferAttribute(shared, 3));
         let meh = this.mesh = new Mesh(geo, [
             this.mats.normal,
             this.mats.face
@@ -266,24 +274,27 @@ mesh.model = class MeshModel extends mesh.object {
         // this ref allows clicks to be traced to models and groups
         meh.model = this;
         // persist in db so it can be restored on page load
-        mapp.db.space.put(this.id, { file: this.file, mesh: vertices });
+        mapp.db.space.put(this.id, { file: this.file, mesh: local });
         // sync data to worker
-        worker.model_load({id: this.id, name: this.file, vertices});
+        worker.model_load({ id: this.id, name: this.file, vertices: shared });
     }
 
     reload(vertices) {
+        let local = mesh.util.toLocal32(vertices);
+        let shared = mesh.util.toSharedF32(vertices);
+        console.log('reload', { vertices, local, shared });
         let was = this.wireframe(false);
         let geo = this.mesh.geometry;
-        geo.setAttribute('position', new BufferAttribute(vertices, 3));
+        geo.setAttribute('position', new BufferAttribute(shared, 3));
         // signal util.box3expand that geometry changed
         geo._model_invalid = true;
         geo.computeVertexNormals();
         // allows raycasting to work
         geo.computeBoundingSphere();
         // persist in db so it can be restored on page load
-        mapp.db.space.put(this.id, { file: this.file, mesh: vertices });
+        mapp.db.space.put(this.id, { file: this.file, mesh: local });
         // sync data to worker
-        worker.model_load({id: this.id, name: this.name, vertices});
+        worker.model_load({id: this.id, name: this.name, vertices: shared });
         // restore wireframe state
         this.wireframe(was);
         // fixup normals
diff --git a/src/mesh/object.js b/src/mesh/object.js
index f7b73602..4f7258d7 100644
--- a/src/mesh/object.js
+++ b/src/mesh/object.js
@@ -128,6 +128,7 @@ mesh.object = class MeshObject {
     }
 
     rotate(x = 0, y = 0, z = 0) {
+        console.log('rotate', ...arguments);
         if (x) this.object.rotateOnWorldAxis(new Vector3(1,0,0), x);
         if (y) this.object.rotateOnWorldAxis(new Vector3(0,1,0), y);
         if (z) this.object.rotateOnWorldAxis(new Vector3(0,0,1), z);
diff --git a/src/mesh/util.js b/src/mesh/util.js
index 67322776..0dbffa39 100644
--- a/src/mesh/util.js
+++ b/src/mesh/util.js
@@ -300,6 +300,25 @@ const util = exports({
             groups.push({ start: 0, count: Infinity });
         }
         return groups;
+    },
+
+    toSharedF32(float32) {
+        if (float32.buffer instanceof SharedArrayBuffer) {
+            return float32;
+        }
+        let { buffer } = float32;
+        let shared = new Float32Array(new SharedArrayBuffer(buffer.byteLength));
+        shared.set(float32);
+        return shared;
+    },
+
+    toLocal32(shared32) {
+        if (!(shared32.buffer instanceof SharedArrayBuffer)) {
+            return shared32;
+        }
+        let local = new Float32Array(shared32.length);
+        local.set(shared32);
+        return local;
     }
 
 });
diff --git a/src/mesh/work.js b/src/mesh/work.js
index 39558b36..dc9a4d8e 100644
--- a/src/mesh/work.js
+++ b/src/mesh/work.js
@@ -21,6 +21,7 @@
 gapp.main("mesh.work", [], (root) => {
 
 const { Matrix4, Vector3, BufferGeometry, BufferAttribute, computeFaceNormal } = THREE;
+const { Quaternion } = THREE;
 const { base, mesh, moto } = root;
 const { client, worker } = moto;
 const { util } = mesh;
@@ -97,6 +98,16 @@ function indexFaces(id) {
 }
 
 let model = {
+    rotate(data) {
+        let { id, x, y, z } = data;
+        let rec = cache[id];
+        let { geo } = rec;
+        if (x) geo.applyQuaternion(new Quaternion().setFromAxisAngle(new Vector3(1,0,0), x));
+        if (y) geo.applyQuaternion(new Quaternion().setFromAxisAngle(new Vector3(0,1,0), y));
+        if (z) geo.applyQuaternion(new Quaternion().setFromAxisAngle(new Vector3(0,0,1), z));
+        console.log({ rec, data, geo: geo.attributes.position.array });
+    },
+
     load(data) {
         let { vertices, name, id } = data;
         let geo = new BufferGeometry();