diff --git a/src/components/three/ModelViewer.tsx b/src/components/three/ModelViewer.tsx
index 62cc5e0..c507ce0 100644
--- a/src/components/three/ModelViewer.tsx
+++ b/src/components/three/ModelViewer.tsx
@@ -5,6 +5,7 @@ import { Loader2 } from 'lucide-react';
 import * as THREE from 'three';
 import { useModelStore, type SceneModel } from '@/stores/useModelStore';
 import { findNearestVertex, detectHoleAtFace, findNearestEdgeSegment, detectCircularEdgeAtPoint } from './SmartMeasure';
+import { registerModelLocalGroup, unregisterModelLocalGroup } from '@/lib/modelTransforms';
 
 interface ModelViewerProps {
   url?: string; // legacy, ignored — uses store.models