I run a stone retarding drum 3 strand chain, the door on the feeder house with the spring with a small chain on it 5th loop. rock trap geared 1 to 1 ratio, have had great luck so far. RMK
Try running the first two veins in the mid position and the rest in the rear position.(2000,2366,6row,5mph) Slow the rotor down as slow as it goes.Drum top position.Is your grates half pluged also when corn stalks get wetIJ