C-bot proximity sensor bracket

This is a simple bracket to hold a LJ12A3-4-Z/BY proximity sensor to the back of the C-Bot's direct-drive plate. The "normal" hole has a 14mm diameter. The "big" file has a 20mm diameter.
Full blog post describing how to hook up every facet of this sensor with RepRap Firmware and RADDS:
http://www.akeric.com/blog/?p=4062