My 5330/FAI's have worked well. I did have one last year that I had to send back to Hobby Lobby because it had started to be very noisy. I thought either a magnet was getting loose or a bearing was going bad. Anyway, they replaced it. I probably have close to 100 flights on the replacement and things are doing well. It seems to be a very good motor and Hobby Lobby provided good customer service.

Emory