Well I got er done. First reversed motor on base so switch faces forward, and wheels turn away from operator. Also replaced the bearings while had motor apart. Built three jigs to make disks. First is to drill center hole using drill press. Free hand drilling will result in wheels that wobble. Second jig is to cut disk using band saw, and third is to cut "expansion / cooling" slots in polishing wheel. Ordered some 220 grit silicon carbide off Ebay, which came in today. Went by Klingspor's yesterday, and picked up both white and green polishing compound, along with a bar of carnuba wax. To make grinding wheel, first you coat surface with ordinary wood glue, then add silicon carbide grit. You personal glue spreader, AKA, finger works best for this. After glue / SC has dried, you rub wheel with carnuba wax with grinder off. For polishing wheel, with grinder running, coat with polishing compound. Sharpened a couple knives today. One was a "chef's knife" that I rescued from dumpster several years back. It is one of those Harris Teeter" specials, which was in bad shape. Less than a minute, and it will remove the hair off your arm. WOW! Izzy Swan has a nice video showing how to charge wheels, FYI.