NOTE: This is the updated design

I was unhappy with the stock bolt system to fix the laser module, mine would slide down a few millimetres as you tighten the bolt so I decided to design this. It is placed between the carriage plate and the laser module mounting bracket. The bolts at the back should just be long enough, they were on mine.

There are 2 printable bolts, one is designed so you can screw the stock bolt into the 3D printed one to reinforce it.