Extra endstop adapter for reprap prusa mendal i2 or i3

This mounts directly to the extra/endstop-holder.stl to rotate a mechanical endstop 90° (about z). I found that I needed to rotate my y-axis endstop to engage under the heated build plate, directly against the aluminum base plate. This mounts directly to the extra/endstop-holder.stl. It's slightly adjustable.