Every year I occasionally find a trail of corn behind the combine from grain falling into the fan. My question is how fast should I be running with this setup in 200+ bu corn. Usually I'm running around 4 mph as long as I have the power in the drier corn, closer to 3 in the wetter stuff at the beginning of the season. I'm just not certain how this happens other than I'm overloading the chaffer? Any insight would be greatly appreciated..hope someone has some drier corn than we do. Ours is all around 28-30% here in Nebraska.