Get rid of the cover, get a set of slotted grates, set your transport vanes to the fast position at least over the grates ( I have them set fast all the way across). Most of you problemn is too much MOG. Cut as high as you can, maybe miss a little grain. Some sorgh. just are tuffer than others. If you leave a few grains few head thats better than thousands on the ground. The general idea is to knock the berries off, then get the rest of the plant out of the machine as quickly as possible. Cheers