I put a set of razor sharp wheels on a Harbor Freight 6" buffer and it works fine. I have it dedicated to the sharpening system. I turned the motor around on the base so the switch is still in front, but the wheels turn away from you for sharpening. I have the $40 buffer like the gray one posted...
Ed I am very interested in this modification. I run two machines off of one VFD now, but I have to plug the machine I am using into the Twistlock plug I have coming out of my VFD.