We have 36'MacDons and twelve row corn heads on our walker machines. Never had any extra weight on the combines, not even fluid in the rear tires. You don't need the heavier lift cylinders for a MacDon either. Even on twelve row corn heads we sometimes get by with the smaller lift cylinder, but it's inconvenient. Our unloading augers don't reach to the middle of the grain cart, so we just don't heap it up that much.