The twin motors in my Vacuflo 960 (built in) were in need of brushes, and had a lot of miles on the bearings. It is recommended that new motors be purchased instead of rebuilding, but having the ability to turn the armature and replacing the bearings seemed to me like a much better proposition, as the cost difference was more than $350. As I suspected, I was right. The vacuum now operates as good as new, and the bearings have performed perfectly. Great product and wonderful service.