Summary

I created this to make my Z axis adjustment more precise.

Instructions

The backplate should be glued to the left X-Axis carriage like in the photo. The switch should be placed below the triggerarm with a fitting assembly. (I used a variation of the holder from http://www.thingiverse.com/thing:194391).

The arm should be screwed to the baseplate with a M3 screw and nut (thats what the the slot in the baseplate is for), and a spring should be placed between both parts. The little faceplate can be used to hold the arm stable over the baseplate and to close up the slot after assembly. It looks quite good, too! ;)

Prusa i3 adjustable Z endstop trigger arm