I have 2 Berry's. First one died after 15 years of use. Found new motor bearings from a thread and now it's running again. I bought the HF when Berry #1 quit. The cheap small model. The 2nd time I used it the wingnut worked it's way loose and deposited a pile of dust in a 4 foot circle around it. All that was being polished was 20-30 PF posts. It's garbage. I tossed it in the trash. Bought my 2nd Berry and it's great. Then found the bearing thread on the Berry model and now have 2 working fine. I'll stick with what works and that's not a HF POS.