Some objects have the Turbosmooth modifier applied during rendering (geometry for smoothing). Adjust the level of smoothing as needed. Similar objects are duplicated using Instance, with no unnecessarily heavy maps.

Polys: 120 340
Verts: 123 654

Units: Millimeters

Preview renders are done in Corona Render 12.
The model uses Corona Legacy Mtl.
For Corona render, it is recommended to use the version.