diff --git a/assets/Main Assembly V1 (2).stl b/assets/Main Assembly V1 (2).stl
new file mode 100644
index 0000000..9156f99
Binary files /dev/null and b/assets/Main Assembly V1 (2).stl differ
diff --git a/web_ui.py b/web_ui.py
index a5e5517..15d0098 100644
--- a/web_ui.py
+++ b/web_ui.py
@@ -151,6 +151,15 @@ class ControlApi:
     def _migrate_legacy_model(self):
         if self.model_cache.is_file():
             return
+        default_asset = Path(__file__).resolve().parent / "assets" / "Main Assembly V1 (2).stl"
+        if default_asset.is_file():
+            try:
+                self.model_cache.parent.mkdir(exist_ok=True)
+                shutil.copyfile(default_asset, self.model_cache)
+                self.model_cache_name.write_text(default_asset.name, encoding="utf-8")
+                return
+            except Exception:
+                pass
         try:
             path = Path(json.loads(self.model_path.read_text(encoding="utf-8"))["path"])
             if path.is_file() and path.suffix.lower() == ".stl" and path.stat().st_size <= 30 * 1024 * 1024: