first one must install the lARGE seed kit part no. I 8 1 2-O. Since you are not having any problem with material other than grain, I would concentrate on the NUT separation area; this is the area inside the high visability glass door. As you sit in the seat concentrate on the mass sitting just behind the steering wheel. Evidently it needs tweaking a bit. Also I have received a email from my friend Paul Bunion (sic) who is very perturbed at you. Seems you are encroaching on his business, as well as flooding the market with toothpicks, now he is thinking of sueing all the owners of the Acorn Special Gleaner Guys ....