I bought some used ones from fleabay, and they were all gritty and unusable. Less that 10 minutes each and I had them like new again! The bearings didn’t seem damaged, but they were dried up and crusty. I thought they were needle bearings in mine, but they might have been balls. Whatever they were, they weren’t captured, and I had to make sure I got all of them back in there with a drop of oil!
RV-8 empenage finished 10-2020
Wings Started.. 11-2020