Model:
- Model properly sized in mm units
- Model has no hidden elements, frozen elements, groups, linked objects
- There is no trash objects, cameras, helpers, layers, particle view, lights
- All elements have 100/100/100 scale and correct normals
- No any modifiers in stack except of turbosmooth
- Elements properly named

Materials and maps:
- There is no missing textures
- There is no unnecessary maps in environment, background, unwrap modifier
- Material editor resetted, all paths striped
- Materials and textures properly named

General:
- There is no 3rd-party plugin used
- There is no ALC and CRP viruses
- Track View Controllers deleted