GT2 belts, but not on a slow boat from China.  I'm, like,

3D Printing
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21

I have plenty of open (saaay, is there a method to skive them in a loop?)

22

I like a product on the openbuilds site. Belt clamp. Check it out.

23

It’s gotta wrap around a 20 tooth gear…and a 40 tooth gear at the other end.  I’ll just put in an order and wait.