link to a laser, if you want to use a diferent one than feel free to do so, you just need to edit the bore inside a part called laser tube and everything should work fine:
https://allegro.pl/oferta/laser-wskaznik-laserowy-latarka-zabawka-kota-kotek-2w1-13319326091
instructional video on yt:
https://youtu.be/hzQJwwmpx4I
also, the 3 bolts are M5
LaserColimator_-_batteryBox.stl | 157.9KB | |
LaserColimator_-_cap.stl | 141.9KB | |
LaserColimator_-_Colimator_body.stl | 395.6KB | |
LaserColimator_-_laser_tube.stl | 214.1KB | |
LaserColimator_-_Target.stl | 81.3KB |