Printed teeth are weaker than the belt's own teeth.
Conversely, with this design the center pin could break loose and the belt would still hold, because the pin just has to stop the loop from fitting through the slot.
Conversely, with this design the center pin could break loose and the belt would still hold, because the pin just has to stop the loop from fitting through the slot.
Belts will burn through polycarb if it isn't tracking properly. They are strong enough to deform any pulley mount on a tight fit.
Only minor complaint is that the teeth will slip if you don't have a ton of them engaged (or they are excessively loose) but otherwise they are amazingly useful.