Here's a couple pics of the Kile flights installed showing the 45 degree angle retained from the oe flights where the material enters the transition from the feeder. IMO since case is intent on continuing to use the end feed system to rotor, keeping that 45 degree angle is needed.
Something else that one might try if you are having trouble feeding the rotor or if the rotor seems to be consuming too much power, is to sharpen and adjust the impeller wear blades. Ron Kile now offers this option. Its simple to visualize the need if you've ever removed the front halfmoon cover to the rotor and ran the machine with the rotor at wheat speed. Even though they removed 2 of the impellers, it's still a "wall of steel" that the feeder has to stuff material into. There is a gap between the rotor bearing mount plate and the impellers. This is so the kidney or bearing hub if you wish, can be mounted. When you try to stuff material into the spinning rotor, it has to "transition" to the circular motion, but still retain its rearward movement. The further around the rotor that the material has to go, the longer it takes to make that transition. All the while keeping in mind that more material is being sent in all the way across the feeder. The center bing stuffed right into the bearing hub. By sharpening the wear blades and adjusting them close to the kidney, the material can be cut and start its rearward movement a lot quicker which will free up more space for new material to enter.
In corn, it's probably of very litttle value. But if you want to diagnose your machine, take a look at the face and outside edge of the kidney and also the leading edge and back side of the leading edge of your wear blades. If they're even shiny or have any wear to them at all, material is following the wear blade around and is getting caught between the wear blade and kidney. That's the only way for those surfaces to get any wear. That material being caught between is a horsepower sponge, and no valuable use is being had for that power.
IMO, jmho, my 3 cents with inflation, etc.