Makergear M2 Optical Endstop Mount

Replaces the mechanical switch Z endstop - This endstop is super critical to get good bed adhesion. I feel that the original mechanical switch one was not as repeatable as this optical one is.

You can find the optical switch on Ebay, search for "Slot Type Optical Coupling" they are around $1.5 each. The pinout is usually printed on the back, DO is the digital out which you connect to the original switch signal lead, AO is analog out that you can leave unconnected. I bent the header pins stra