To the OP, as a fanboy and owner for the Andersen Ultimate, let me say given the size/weight of your RV. I'd look at a traditional hitch. I'm a member of the Grand Design facebook page and have been following experiences of a fellow on there that has a larger GD fifth wheel and has had some hitch base weld cracking as well some other issues. This is not the first report I've seen either regarding that hitch and large fifth wheels. I think the Andersen is fine for lighter weight fivers but I personally would be looking at something else if I had a 40' RV.
