I have not ran factory rotor with steep helicals, so cannot say how good that performs. The Sunny will always out perform, in my opinion, because quality will be better as you can run slower rpm without vibration_rumble and be easier on drives(this may not be a factor on small grains however). Saw new R75 and they still come with 4 reverse bars in left section. Does anyone know of a crop_harvest condition that would require that to seperateIJ My dealer takes two out and replaces with forewards before they go out. I will investigate the hump kit and probably do it too. I have no problem with rock door opening unnecesarily now, so don't see that as an issue. When I trade this machine, it will be interesting to see if the extra value can be realized, or else I will keep all the goodies and give them back what they first sold me. Thanks to everyone for your comments.