I have used the Gehringhoff corn head for three years now - uses 3 rolls (a third roll is stacked discs that are very sharp) to cut rather than shred stalk - more horsepower efficient than shreding. They will pull some more than a regular head. My findings are that the Gleaner(newest versions) header drive and Cat's are the best to handle it. The New Holland is next best, and CIH and Deere last. The shame of it is for Deere people is that in Europe they sell a one speed header drive that is Great, but won't sell it here. Got to go now. If you have more questions about this header, glad to respond.