This is going to sound like one of those very tall and totally unbelievable tales from down under! In 1984 we were doing some custom cutting of wheat in our then new N7. The wheat crop we pulled into was very thin but seemed well headed. Nothing was coming out the back so we just kept on pushing the speed up. The wheat just poured in and a terrific sample. We reached capacity at 14MPH. The crop finished up yielding 42BPA across the weigh bridge. We could only drive for about 2 hours before we got a severe case of the wobblies from the bat reel whirring around in front of us and had to change drivers. The farmer complained about the speed, had a good look and just said; " Its too d--n fast but keep going, I can't find any thing". The local JD boys who had been "cock of the walk" were thoroughly browned off! Tall tale; No! Quite true. Unfortunately we have never found another crop where we could do that again. And yes Dan,in very dry conditions you can really boom along if your knife is well set up and the conditions are right. We have much drier harvesting conditions down here and the speeds, at least in cereals, that you guys seem to operate at are usually on the low side for us. Cheers.