Eggbot/Spherebot/polargraph PCB mount for ver 2.1 and later

This is a mount for my Eggbot/Spherebot/polargraph v2.1 (and later) controller PCB.

See http://www.thingiverse.com/thing:1394948 for the controller PCB.

PCB design files and polargraph_server_a1 (and Eggbot) firmware modified for my board available on github

PCB: https://github.com/MarkJB/Eggbot-Spherebot-polargraph-Controller
Polargraph firmware: https://github.com/MarkJB/polargraph_server_a1
Eggbot/Spherebot firmware: https://github.com/MarkJB/SphereBot

See Glasswalkers great 3