Experimental Quadcopter

Parts for a quadcopter I've been slowly building, breaking and upgrading. As I upload parts I'll try to keep things organized by increasing the version number at the end of the filename. Included will be stl files as well as SolidWorks part files. (SolidWorks2016)

Assembly:
The parts are stacked from bottom to top as follows. Battery-cradle, base-plate, motor-arms, vib-plate-bottom, top-cover. The stack is held together with 6-32 socket head cap screws inserted from the top down. I'd recomm