Prusa i3 X-Z axis leadscrew

This is a modified version for the transition to leadscrew
Its differences from the original - support bearings - 608zz
Nut under the 4 holes.
There are two versions for motor - with a hole for a mechanical endstop and without (but you can always reprint endstop holder in the form of additional details)
For mechanical endstop recommend using this model http://www.thingiverse.com/thing:603961
It is also all the parts are in need of post-processing (mechanical or chemical) to bring guide sha