i started harvest corn with my 7230 and there's always full of kernel 1 in x 1 in and whatever i do change and the tailing is always high rotor is at 400 concave 35 large wires module in front the upper sieve is 10 and buttom sieve is 7 blower at 1050 rpm ,i'm wondering if the round bar would in fornt would help? corn moisture 24-27 % , is someone ever had that kind of problem ?