We got a 7010 this year and we are having trouble in certain hybrids dumping corn out the back we are running around 4.00 mph with a 8 row head in around 22 and under corn doing close to 200 dryland are settings are 300 rotor concave 10 pre sieve 4 top sieve 25 in the cab shows 18 in the back and bottom at 15 if you have any suggestions please let me know