Gary -
I thought about the midroof design as well, but after spending a few days in a way too short (I'm 6'6") and way too cramped Monaco moterhome, I decided to build the tallest box I possibly could, and provide comfortable sleeping arrangements for as many as possible. Understand, though, that this would not be the best deal for someone who stayed in RV sites, as I can imagine that low hanging trees would get real old real quick. This thing is for going to and from the races with a stacker trailer in tow, and believe me, the tall inside height makes it feel a lot roomier inside. The downside is that the roof air controls and vent fan cranks can only be reached by me (everyone else can use a stool). Should have wired in a wall thermostat, but that'll be for the next one I do