Board Thread:Questions and answers/@comment-28773666-20190519163407/@comment-30049823-20190521234721

Somebody made a prototype 3D-printed belt: Facebook video of it in action

...but apparently it was cost-prohibitive to make.

I'm trying to make some out of CPVC pipe sections stitched together with some 16ga wire and 17-cent sheets of rugmaking material from Hobby Lobby, with some buttons glued to the pipe pieces as feeder teeth. Results have been... mixed. But it has potential. The pieces are all pretty inexpensive, but it's been very labor-intensive.

As to the original topic, the "best stock?" question always has the same answer, I think: ZAP!