A whole new design with drivetrain was drawn up in Solidworks and created at Makerplace and FablabSD (it's current home).
This new version adds:
a lightweight aircraft grade aluminum ring
CNC machined drive train
3HP AmpFlow brushed motor
Kelley controller with 0-5v sense for power
2x750 watt drive PSUs ( from robotics)
RPM control via Arduino, hall effect sensors and an R/C pass 0-5 Speed controller signal
physical positioning via a MPU-6050 ( for low RPM POV)
serial bluetooth position sending to processing
Drivetrain with Idler installed
Plasma'ed piece on ring assembly
Welder with the finished Al ring!