OK, you've got a straight M so likely the airfoil chaffer is a good idea since you've got the "short shoe" compared to the later models. I'd guess the only limiting problem you might face would be your clean grain elevator in corn. If I'm thinking right your clean grain elevator is @5" wide, and the Corn+ and Corn/Soy specials are @7-1/4". I suppose that if that becomes an issue you might be able to speed up your clean grain elevator to move all that corn away faster!