I would love to take this off your hands, but I am on the wrong coast and don't foresee a trip anytime soon.
It does, however, give me plenty of fuel for a similar build of my own. Did you use any kind of flashing or sealant where the coroplast panels went together or where the windows were riveted to prevent leaks in to the bed?
The small gurney flap is a nice addition to it as well- 3/8"?