I went thru this same excersize with my previous 2013 TT and I found the perfect Curt bolt on hitch that would fit the frame. I called CW to get setup for a buy with install and they discouraged me from doing a bolt on and suggested I use the machine shop that they sent all their RV jobs to. So I called them and they said don't buy any receiver to just bring it in and they would custom fabricaste what I needed. That turned out to be the best idea of all. They frame welded a 500# capable receiver and while they were at it they added and welded flatiron to further strengthen the bumper. It cost me $350 and that covered everything and I had a much better end product.
