When I traded for my R65 3 years ago the dealer wanted $17000 more for RWA on it and wouldn't give me anything extra for the one on my R72 that I was trading in so I bought a regular axle and kept the RWA with the idea I might need it some time later. 3 years have passed and I haven't needed it so I decided to sell it. It's a gamble, you know as soon as I sell it I'm going to need it. That's Murphy's law. It worked fine I never had any trouble ever with it. Before the R72 I ran White 9700 and 9720's from 1979 thru 1996 and those combines were so heavy on the back that you really needed RWA all the time. Gleaners are balanced much better and can go thru a lot more before you need it. Hope that answers your question.