I needed a way to test a prototype of an adjustable cylindrical lens required to help people with astigmatism in 3rd world countries. Using 7 lasers allows me to test the complete range of the lens while being able to find the focal point(s). However, a professional laser box easily exceeds $150.

This mount allows you to calibrate 7 laser modules with a diameter of 6mm.

This only works with low power lasers due to the low melting point of PLA. When using higher power laser modules, consider using PLA.