Z Axis rod/screw support

**Lightly modified version to avoid the outer face over hanging the edge of the frame linked here - http://www.thingiverse.com/thing:1800202**

Simple top support for the Z axis on the Max Micron 20/20 aluminum frame printer to replace stock as the acrylic seems to easy to crack.

•added return down back side for squaring easier, and a hole for a 3rd bolt if you want *(thought not really needed)*
•Added nut holders on the underside of the rod stop so no wrench needed in that tight spot. *