While cutting short barley today I have been having a problem with the grain coming back out of the feeder house and over top of the auger and refeeding back into the bottom. I was wondering if this could be related to the old style 4 blade rock beater? I've never really had this problem before. The only thing that I have changed is the Header, went from 17 1/2 feet to 22 1/2 feet. I'm having to go a lot slower I'm cutting at about 3.5 mph versus 5 mph last year.