When Deere finally introduces the bi-rotor, I hope they include the slide out feature of the rotor and cage, as that feature made internal clean out fast and easy, as well as good service access to the concave cage and rotor. Also, inclusion of the dual path grain handling system circulating around the combine body would eliminate the lower and upper cross augers for the clean grain and tailing. This would make it easier to meet the Combine Clean Out standards being developed by ASABE. Adoption of the dual lower sump grain tank should also make tank clean out easier. Ultimately, they will include ClAD - Center line Auger Drive headers by running the header drive shaft through the hollowed out center of the axial rotors, thus making better use of this area. It seems like the 9870 STS five speed header drive is an incremental step in this direction. Eventually the and header drive gearcases would be located as a package up behind the rotor, and integrated together, similar to the powertrain through the center of a rowcrop tractor drive and PTO, just reversed. All just takes time and adequate customer demand. Eventually the Versatile Power System proposed via the XBR2 Bi-Rotor configuration will evolve to be used as an up front planter, front spray toolbar, and harvester capabilities.