Anybody else noticed how the beans seem to pile up on the belts and actually roll forward towards the sickle and then the real throws them back up. I have a buddy running with me , he has a 40 ft deere draper his belts are going much faster and looks to feed and cut better. I actually think the MacDon would cut better if the already cut beans weren't rolling back down the belt and crowding the cutter bar from behind. Knobs turned as fast as it will go and dealer says that's all I can get. Anybody got any suggestions? This is a 45ft on a JD 680