I built a knockoff of the Stew-Mac buffer about a year ago. I didn't do a build thread at the time, but thought I'd do a recap now. This is it: And here it is with the cover off: It's really pretty simple. A couple bearing blocks support the axle, which is 3/4" diameter keyed shaft. It doesn't really need to be keyed, but that's what I had on hand. To get some speed reduction, the pulley on the axle is larger than the one on the motor. I don't have much space in my shop, so my concept was to build a multi-purpose "power supply" stand that houses the motor and switch. Then I plan to build a number of different attachments to swap on the top. The buffer is the first. I'm thinking a thickness sander might be next, but that's for a different day. Anyway, I made the stand by cutting down a generic tool stand from HF. Notice the motor is mounted perpendicular to the buffer axle and the belt twists 90 degrees. That was done in anticipation of future attachments and wouldn't be necessary for a dedicated buffer.