get rid of the sweep. My dad runs a 79 N6 we have had the sweep out now for 4 yrs, and it has been running just fine. When we bought the combine in 85 we ran it for one yr. The scecond yr we took the belt off and ran it that way uptil 4 yrs ago. The cage dose not need any covers on it, and as for losses we do not have any. We have also done some hyping to it too, like running a sunnybrooke rotor and concave, the rolls are all updated and the rest of the machine is too, Dad is running around 290 hp, so he some what keeps up to my two R72.Hope this helps Colin