Nice read about the Retro 7! As I said earlier, I love my Retro 5, and while it does have its space limitations, I've come to view this as a good thing--sort of like how a goldfish will only grow to the size of its tank. The Retro 5 keeps me from lugging around more gear than I need (or buying more than I need!). I always carry 2 bodies and 3 lenses in it, albeit usually only one body can have a mounted lens.
If I ever upgrade to a larger size, it will definitely be the Retro 7. Think Tank makes terrific products.