I'm about to go out and get started on repairing rot in my 2007 Lance 815. I'll not get into details, but I'm fixing it up good enough to make our trip - delayed by 3 days because of the rot I discov...
I think Will has a good point. We don't see problems with commercial rigs of that type and we don't even read much on RV.net about real failures. Even the cheaply made tt's like mine don't ever seem to have problems with the aluminum framing. I wouldn't hesitate to get an aluminum framed TC and in fact that's probably the only type I would buy.