The cutter did an excellent job removing wood. When I saw that I wasn't using the bottom bearing I tried replacing it with a bottom bearing. next problem! I couldn't find a suitable Allen key to loosen the set screw. I've tried SAE and metric. They were either too small or too big. To figure out what size it is, I tried measuring it with a dial. If done correctly, I measured 0.080. As a side note, I didn't push the bearing too hard. Hope that helps.