Robo 3D Z-Axis Limit Switch Fine Adjustment

**note, this is only applicable to fairly early Kickstarter Robo3D model. Later Kickstarter shipments and the R1 have a solution already in place.
This thing is a bracket to attach a screw to the z-axis motor mount of the robo3D to facilitate fine adjustment of the z-axis home position.
It is actually a remix to a mod posted by another Robo3D forum member, Cambo3D. Here is the link to the oritingal mod.
http://forums.robo3dprinter.com/index.php?threads/better-z-height-adjustment-mod.838/