We needed a easier way to tuner the Z endstop on our Prusa Mendel i3, as reworked by eMotionTech (http://www.thingiverse.com/thing:119616).
The original Endstop, while being very solid was not easy to tune precisely.
So we took the idea of using a screw to tuner the relative position to the endstop and ... Voila ! ;)
Works like a charm and make our life much easier ! ;)
-Print all 3 Parts
-Then glue together part1 and part2 (we used acetone to merge these two parts (ABS printed))
-unscrew/remove the original zendstop holder (and endstop)
-install the endstop to the part1+2 group
-using longer screws, fix part1+2 to the bottom left 2 motor
-same thing here fix part3 on the X axis motor
-screw a bolt (with a tuning nut) on part3
-then use the bolt to adjust Z endstop relative position