Drive Belt Fastening
The A3X has a new belt fastening scheme that does not work:
The main problem is the bolt is not long enough to reach the captive nut in the rail. But also it takes up a lot of room that limits the laser carriage moment, and the belt goes round two sharp corners where it will likely tear after some use.
I found a good way to fix these problems:
You can read more about this on my blog: http://www.igregious.com/2017/09/eleksmaker-laser-belt-fastenings.html