PK8 Z Endstop (MakerBot Endstop)

thingiverse

I swapped out my mechanical endstop for a more accurate one because it's simply better than the cheap China sensor. I was missing the original endstop, but I had some MakerBot ones left that I then mounted. The holder is available here and can be easily screwed onto the shaft with two M3 screws - the thread is even printed as well. Since you can turn the shaft, you can align the endstop perfectly to the X axis. With Marlin, it's a good idea to switch on LCD leveling for precise alignment.