Overhaul consisted of hardsurfacing the augers, chroming concaves and bars, feederhouse chain and sprockets, and several updates of which i'm not sure what they entailed. I have a 9600 and a 9610. The whole rotary thing is new to me. The machine is not wore out by any means. However, we have some sandy soil out here and typically chrome things. I also harvest a lot of grass seed and need bars and grate in A-1 condition to do a good job. Thank you for your input in advance.