Framed it out with 2×4's, 1x4 base and plywood, then covered it with waterproof canvas. It is lighter than a fiberglass top, but still takes two to put it on. The rear door is attached with door hinges ressesed and hidden under the top canvas that runs from front to base of rear flip up lid. I...
I framed the inside with wood and pywood then covered it with waterproof canvas(rapid prototyping:) ) Its lighter than a fiberglass top bit takes two people to put it on. I plan to weld up a steel frame if I like. So far it is good.