Interesting reading. I think that is why the steeper (older) heads sometimes feed better. Take Marion's eggbeater example and run the straw in at an angle and it will feed just fine. Maybe the newer flat profile heads need rolls with spiral flutes, rather than straightIJ Or, maybe a system like they use to de-bark trees used for power poles where they grab one end and pull it thru a dieIJ But then you would still get too many leaves along with the ears...