Prusa Z Adjuster
by lazzymonk, published
A simple screw adjuster for the z axis endstop on a prusa.
Has a m3 nut trap top and bottom so you can either use a spring or 2 nyloc nuts.
Needs about 10mm overhang of the x axis smooth rods.
The blue thumb wheel is http://www.thingiverse.com/thing:29782