Well, originally I was happy with my Athearn CF-7s, but then I went and bought an Atlas Master Seires U23B. And geez, that thing runs smooth as silk, and the Athearns now seem noisy and rough with poor low-end speed control. Just to see where the problem was, I removed the universal joints from a CF-7. I then placed it on the track and ran just the motor. Well, the motor is very noisy. I put a little LaBelle oil on the bearings, but it didn't change anything. I think I want to repower the loco with a good can motor. I did some research, but want to ask if any of you have done a remotor job before. What motor would you recommend, etc?