I thought in the manual it looked like the long belt that drives the rotor variators could be put on a different size pulley for different applications. I'm in the U.S. cornbelt and the machine is set up as a corn/soybean machine. All the clinics I've been to they want the rotors running around 370-400, the same speed as you run the cylinder in corn. I'm just wondering if they come from factory set to run different speeds for different applications? Corn is probably only crop to run that slow?I’m sure rotors don’t go below 500. Just not mechanically possible….unless at idle.