I recommend to use opensubdiv modifier for cord instead of turbosmooth --- Model --- Model properly sized in mm units Model has no hidden/frozen elements, no groups/linked objects No lights, cameras, helpers, layers, particle view All elements has 100/100/100 scale and correct normals No any modifiers in stack except of turbosmooth Elements properly named
--- Materials and maps --- No missing textures No unnecessary maps in environment / background / unwrap modifier Material editor resetted, all paths striped Materials and textures properly named
--- General --- No 3rd-party plugin used No ALC and CRP viruses Track View Controllers deleted