Steve that's a roof design very similiar to my camper. One issue that you will need to address is weather sealing while underway. Mine doesn't leak when stationary but if its raining heavily while being towed, water can force its way past my thick weather strip seals - essentially around the front leading edge where the air pressure will be greatest. In mine I have a storage shelf that extends across the inside front panel which catches water comng in past that seal. Looks good.