Pioneer, I hope you got this thing up to expectations by now. There are areas that just love this rotor. That includes a private Gleaner guru in Alberta that has installed lots of them for their wheat, peas, canola, ect. He sets them all up with forward rasp bars right off the get go. He makes sure the concave has been set per Gleaners instructions. He has just started playing with some steep pitch thresher helicals but don't know if that is in CDF equiped machines. I do know of three macines with CDFs that have a unique setup for this year. That is full steep pitch thresher helicals with them spaced the same as the normal pitch are and shimmed out 1/4". I do believe this preserves the room between helicals for cobs to roll and leaves enough space to prevent cob breakage. It also prevents second pass of some material over concave and brings metal to metal surfaces closer to maybe prevent the bridging in some crops. I believe it is the bridging that is giving some guys crop loss in some crops or conditions. I think a guy can find the trick that will make it more forgiving for all crops and conditions. I'd rather find the trick rather than have to run different concaves, seperator grates, pre-thresher grate and some of the other things that some brands have to do betweem crops. Also I may add that complete front and rear half of thresher concave does not fit the CDF perfectly threwout but the front half fits very well and that is about all we ever had in the P1 days. The back half may drop off a bit for the small grain settings but don't think that is a major problem. Also setting the seperator grate down to 3 isn't much more that leaving the grate on 9 (cage diameter) with the 25" Gleaner eight bar setup. With the CDF being 1/2" smaller radius you may need grate on number 0 to make much of a difference. I'm sorry for I am speculating hear a bit and we have our CDFs still set up basically factory for now and they are working just fine. That's not saying I won't get my fingers in there and screw something up someday!!!!