end stop holder

These are a set of endstop holders for those el-cheapo pcb-based mechanical endstops that are all over the place. I made a set of 4 different holders so you can choose which way to mount the PCB.

Originally, I started with a variation of a z endstop holder I saw somewhere on thingiverse. I re-drew it in FreeCAD and put the PCB on the outer side of the holder. Then I found that sometimes you need the PCB flipped around depending on which axis it's for and where it's mounted.

In the e