Few questions??
What year is your 760tt? Which concave are you running, wire or roundbar? Which lower sieve are you running? snubnose 10mm small grain ,standard long tooth 26mm,or the new 2014 extreme long tooth 32mm that mimics the long tooth upper top sieve? Have you made sure all four corners of the concave match what the cab monitor says? Many are running a more concentric concave setting with less pinch for more whole cobs and less seed damage. This can be fixed. Tiger