Yes,I adjust front drum,High for corn, mid for beans and wheat. I also lock the drum arms down(lower the upper stops down to the arms)This stops the front drum from floating or bouncing,which will finally destroy the whole setup.Another benefit from locking the drum into a rigid position is it will "catch" a slug and slip the throat clutch instead of letting it pass and plug the rotor instead.I find it much easier to reverse the throat than unplug the rotor.