diff --git a/src/stores/useModelStore.ts b/src/stores/useModelStore.ts
index abdf245..79612aa 100644
--- a/src/stores/useModelStore.ts
+++ b/src/stores/useModelStore.ts
@@ -33,7 +33,7 @@ function saveXRFeatures(f: XRFeatureFlags) {
   try { localStorage.setItem(XRFEAT_KEY, JSON.stringify(f)); } catch {}
 }
 
-interface StoredPlacement { fineTuning: FineTuning; }
+interface StoredPlacement { fineTuning: FineTuning; calibrationQuat?: [number, number, number, number] | null; }
 function loadPlacements(): Record<string, StoredPlacement> {
   try {
     const raw = localStorage.getItem(PLACEMENT_KEY);
@@ -41,10 +41,14 @@ function loadPlacements(): Record<string, StoredPlacement> {
   } catch {}
   return {};
 }
-function savePlacement(fileName: string, fineTuning: FineTuning) {
+function savePlacement(fileName: string, fineTuning: FineTuning, calibrationQuat?: [number, number, number, number] | null) {
   try {
     const all = loadPlacements();
-    all[fileName] = { fineTuning };
+    const prev = all[fileName] ?? { fineTuning };
+    all[fileName] = {
+      fineTuning,
+      calibrationQuat: calibrationQuat === undefined ? prev.calibrationQuat ?? null : calibrationQuat,
+    };
     localStorage.setItem(PLACEMENT_KEY, JSON.stringify(all));
   } catch {}
 }