Cool project. I'm a friend of T.Low's and a SMB owner. Having driven Tom's Rastro van, it rides like a Caddy and corners like a sports car compared to my 4x4 SMB. The 4x4 SMB really is, and drives like, a 1 ton truck. Off road the Astro seems to work well on rough roads, and easy trails, which is what is was "re-designed" for. All around a pretty nice package.
I was just telling a friend a couple days ago about my idea of using a hard shell RTT with the bottom cut out as the basis for a low cost pop top, and here you are with the same idea! Hmmm, good to know others are thinking about this too.
Looking forward to your posts.