Ender 3 laser mount (bltouch compatible)

_Feb 2021 Update:_ I've uploaded another version with hole spacing between 26 and 30mm, tested with a 10W laser (5.5W should be the same)

A magnetic mount for a cheap laser + driver from aliexpress, rated at 500mW 405nm.

The laser is placed on the front of the hotend fan to make it compatible with common bltouch mounts and other mods while the laser mount slides in the top extrusion.

Materials needed:

- 2x M3 x6mm screws for the laser module
- 2x 25x10x3 magnets for the laser mount
- 2x plastic screws for the driver mount

I've added a 12v step down converter and a level shifter for the fan PWM signal to my Ender 3, and a GX16 connector with cable to the laser driver to make connection fast and easy