If you look behind the seams of the rotor cone you may see some extra wear from the hour usage. I have removed the rotor and welded up the "cupped" area be these seams, I think there are 3 of them. On the left side, or where the crop is pushed up more vertical, it will show more wear in the steel. Welding will burn off the nice paint outside the cone and make sure that no hoses are in that area. Useing a wire feed welder is best for this. JWK