Prusa i3 Z axis top bearing Anti wobble-8mm version

based on http://www.thingiverse.com/thing:242020

Instructions

Replace Prusa3/box_frame/inc/functions.scad and put z-axis_bearing into Prusa3/box_frame and open it by OpenSCAD for stl model creating.
You can use hot glue or epoxy for bearings fixing.

This is the 8mm linear rod , 5mm z axis threaded rod for the box wooden frame version of that part
Uses two 625zz bearings if you do not have these bearings you can use the Virtual bearings.
Use drill bits M8 and M5 in order to get perfec