This is a sturdy mount for a standard sized (15.8 x 27.8 x 10-12mm) limit switch. Mounts directly to the outside plates rather than the carriage in order to reduce the number of moving wires. M5 nuts are held in the mount. I used M5 x 12mm screws to mount to the shapeoko and M3 x 20mm screws for the switch. The STL is a pair of mounts which are mirror symmetric to mount the switch in the same orientation on both sides of the machine. This mount places the endstop in the ideal position to maximize the travel without hitting the belt clip.