I've divided this model into several elements, which I think would be more appropriate for placing individual materials on. Here they are: 1. horizontal platforms 2. pedal 3. vertical supports 4. wheel 5. thread wheelholders 6. wheel spokes 7. comb 8. guide 9. hook 10. thread holders01 Each element is centered and can rotate around its axis, but I didn't save the animation. Essentially, these are just separate parts for which you can assign your own values. Also, please note that the dimensions of the model have been increased. In any case, I wish you success and the*** best of luck :)***