Just browsing RV kits on Barnstormers, both partially complete and untouched, and I have some questions. In many cases the adds give a date on the kit, ie. 2005 RV7 kit, etc. So I'm wondering if that means Vans has made changes to the kits over the years. If that's true, how do I find out what changes have taken place over the years? With the RV7 or RV9, do I want to limit myself to a certain vintage and newer because of significant changes? Thanks