I recommend to use opensubdiv modifier for cord instead of turbosmooth --- Model ---Model properly sized in mm unitsModel has no hidden/frozen elements, no groups/linked objectsNo lights, cameras, helpers, layers, particle viewAll elements has 100/100/100 scale and correct normalsNo any modifiers in stack except of turbosmoothElements properly named
--- Materials and maps ---No missing texturesNo unnecessary maps in environment / background / unwrap modifierMaterial editor resetted, all paths stripedMaterials and textures properly named
--- General ---No 3rd-party plugin usedNo ALC and CRP virusesTrack View Controllers deleted