About this 3D model

Inspired by the Z rod constraints on the Makergear Prusa. You can print 2 or 4 of these and use them to eliminate all Z wobble on your Prusa. I've included some before-and-after photos from cubes but the REAL visual proof will be when I reprint the OH shot glass. BEFORE! http://www.thingiverse.com/image:63205 AFTER! http://www.thingiverse.com/image:63204 SAME GCODE!