While I haven't ran one, I have looked them over pretty good. For one they do appear to be built pretty heavy, and that is a problem for them, as the 9750 STS have problems being transported due to their weight. Also when you do slug the rotor on them, you cannot reverse them with much success, as their concaves and grates are three different diameters. If you try, you can break the tines off on the back end of the rotor. So it is safe to say they have their problems too. My observations, Todd I would like to run one though.