One of the ideas of the Hyper process is to create a high-low cylinder bar arrangement. This, in combination with the F2 bar in the belly, allows the crop to get "tripped up" (by the F2 bar) and expand (with the low or removed cyl. bars). This will allow trapped grain to be separated. The rotor arrangement that we currently run in our R52 is pictured on the Hyper Mod site. We have not experienced any troubles after two seasons and have greatly reduced crop loss. As for the disrupters - I believe Rolf Hedt has tried the "through the cage" disrupters with success. I'm skeptical of trying them in our wetter conditions - seems like they would use hp by preventing good flow through the rotor. Then again, the CaseIH guys seem to like them! Make some, give'em a try and let us know how they work out. That's exactly how all these mods have made their way into many, many Gleaners! Tom langan