We are running Starfire SF2 with an Accutrak hydraulic kit on a 9352 Macdon, and really like it. I think with enough ambition one could make an Outback work the same. Only drawback on hydraulic control steering is that swathers tend to "freewheel" downhill sometimes and not steer properly. You also have to make sure you "center" the steering wheel after every turn,or it will want to pull one way or the other a little bit.

http://www.accutrak.ca/bins/content_page.asp?cid=3-99