I am currently building a seiber Hegner RB! rigid bed milling machine. I have retrfitted it with Bridgeport ballscrew kit. and an AC Tech SMVector VFD Drive to control the spindle. The spindle motor is finally running i will now be migrating over the stepper motors and control from my old round column mill to this then i will be setting up the VFD to run under Mach3 Control. Still alot to do but it is finally coming along will post pictures if anyone is interested.