Hello, I have the Harbor Freight version of this mill in a 6x26 size. The guy I bought it from add power feed on the X axis, DRO and a home built power draw bar. I just completed the conversion to a 3-phase motor and VFD with a hall effect tachometer. I used a Baldor 1.5hp motor that I got off CL and a very cheap VFD off Ebay. I probably have less than $200.00 into the whole conversion. Now with the belts set for the 1350 (???) RPM setting I can go from 200 rpm to 2200 RPM by turning a pot-meter. It had made the operation of this mill so much better. I also wired in a jog switch for both directions so I can power tap with ease. By adjusting the belts to the lowest RPM setting I have been able to get down to 20 RPM but I don't use that much. The belts have been set and forget pretty much.