I think you seriously need to have someone set your head for you. We run a 800 and 8000 gleaner head, same basically I think. We cut beans from waist high clear down to less than knee high and they feed wonderful. I will agree the air reel improves performance of any head which in turns improves combine performance. We all know if its going in the combine in clumps, its going in the processor and out the back in clumps. I hope you can find someone to help you set it. Best of luck.