I'm having trouble getting my 2007 8010 set in milo. It is losing grain out the back and the return is yelling at me tailing volume is too high. The latest setting is 26 top sieve 24 bottom sieve pre sieve 2nd notch air at 1050 and rotor at 700. This is leaving the least on the ground but return is still overloaded and grain sample is not very clean. Any suggestions on how to set these machines?