TwoUp One Up Z Endstop for Tony's gantry

This is a Z-endstop support for Tony_921's gantry ( https://www.thingiverse.com/thing:952796 ) . It is intended to be used with this Z endstop switch mount https://www.thingiverse.com/thing:749806 .

It uses an M3 28mm screw and M3 nut. The spring is the one that comes with the printer (taken from the original extruder as I am using a different one).