Anet A8 - X Belt Tensioner - all m3, with support for long screws and toothed idler

everything is printed, and installed, and it all works.
i will add a photo at a later date once i finalize the studs.

these use the following parts
16 or 24 toothed idler with a 3mm bore (up to a total of 10mm wide), more teeth should fit as well because i left enough room,
need to buy one heres one that [ships from china](https://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&toolid=11800&pub=5575362044&campid=5338241480&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2F253526857430) and [one th