gman, as past Product and Development manager for Agri-Technology we did build our own ideal combine from the ground up. It is better known as the XBR2 Bi-Rotor combine that we built near Winfield Kansas in 1993 and tested _ demoed to manufactures in 1994 and early 1995. It was only publicly displayed at the US Custom Harvester convention in lawrence, KS in Dec 1994. Clearly, among the 17 patents there were many concepts and performance features that would have enhanced combine performance, and JD realized this. Rotating (Bi-Rotor)concave providing 360 degrees of separation, higher Fc, Power unplugging, dynamic vane angles, etc. Dual Path _ Triple option grain handling system that circulated around the chassis and eliminated many grain damaging augers, sprockets and bearings. lateral distributor grain preparation with side hill compensation. Conveyor unloading system w_ variable speed Joystick steering, instead of view obstructing steering wheel. Full tracks for floatation and narrow transport with 120" guage width. (Half tracks like Cat lexion are also a good or better alternative for several reasons that take models to explain.) Versatile Power System configuration to Plant, Spray and Harvest with the same base unit. Overhead dual rotary screen air intake system. Slide out threshing module for easier clean-out. Centerline header drive, knife drive and auger drive _ support. Integrated transport trailer _ hitch. In hindsight, the biggest mistake we made was believing John Deere's stories that they were "interested in building a rotary combine for better grain quality, with fewer parts, perhaps even in Kansas, and with a better floatation like tracks". They bought the patents in July 1995. More details read the book: Dream Reaper by Craig Canine, or see the cutaway in Sept 1994 Farm Journal, or visit my booth and display trailer at the local county fair. I've enjoyed working on combines for John Deere Harvester Works, Claas of America, Caterpillar and Machinerylink during my career, but the Bi-Rotor combine project was most challenging, most fun, but most frustrating as I look back ten years later. Combine options could have been better for farmers if we had followed a different path. This route is just taking longer but with some help from my Farm Buddy fiends, we'll get there eventually. I might consider showing more photos, test data and video at your winter farmer meeting. It is worth knowing what could have been available by now. Sincerely, Alan VanNahmen, on behalf of Mark and Ralph and the Bi-Rotor team.