If you need to make polyurethane belts in custom lengths, it’s not too hard. You just need to take lengths of flexible polyurethane filament, heat the ends, and join them together. In practice, it’s difficult to get it right by hand. That’s why [JBVCreative] built a 3D printed jig to make it easy.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/05/15/custom-polyurethane-belts-made-easy/