I looked at these gears on Ebay, I wonder if any has used them with good luck. I messaged the guy building them. He's saying that he's built over a hundred with no failures. Take a look and tell me what your thought is.
https://www.ebay.com/itm/Logan-10-1...-Printed-NEW/263365824193?hash=item3d51d38ec1
https://www.ebay.com/itm/Logan-10-1...-Printed-NEW/263365824193?hash=item3d51d38ec1