I can't figure out how to stop cracking too much grain in white wheat. Even with new concave and rasp bars did'nt seem to help. I use the 1/2 moon chaffer. Go pretty slow w/ cyl just enough speed to thrash heads. Cutting 160+ bu wheat not going super fast but keeping full. I'm not running too much through return. Any ideas? I'm starting to think that's a characteristic of Gleaners.. My sample doesn't show excessive cracking but still worried. Thanks. If you give me a good idea I'll tell you how to raise 160 bu wheat (irrigated). THANKS!! FOX