Locking 608 Bearing Bracket with Captive Nuts for Makerbot Cupcake

This variant of my Z-axis threaded rod locking bearing bracket is coded in OpenSCAD and has captive nut holes in the "top" so it can be mounted upside-down, under the top panel and save you some grief when tightening the retaining bolts.

No wrenches required!

Revision controlled source can be found at: https://github.com/clothbot/makerbot/blob/master/upgrades/z_bracket_simple_nuts.scad