On our 94 model we had trouble with the feeder chain hitting the top of the feeder house cross member. So we either had to shorten the chain so it would miss the cross member when the drum would fully extend up, and then this would create to much of a gap between the header auger and feeder chain. We ended up making a 6 inch feeder drum that would give us more clearance and more capacity. We did this 3 seasons ago and it has worked real well. I have this combine feeding better than our 99 R72. The slip clutch never goes off, its one awesome bean machine. It takes the wettest green stem beans you could imagine and it puts the cleanest beans in the tank, now if I only had the time to get the 72 set up like this one. I guess I will have to get busy this winter tuning the 72 up.