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I do a lot of weird stuff including host massmind.org and piclist.com and support open source stepper motor drivers including Linistepper, SLAm, and THB6064AH (schematics, PCBs, kits, etc.. available at http://www.linistepper.com )
I've written an Introduction to OpenSCAD with an eye to supporting Customizer
Printers: Printrbot Jr.