I've been thinking about using aluminum diamond plate fer the lazy susan belly pan since it would have enough stiffness to not require the upper cross beams as well as the other structural reinforcements that I used on the Coroplast belly pan. I would only need one 4'x8' aluminum diamond plate sheet to build out Dark Aero's belly pan and chin pan. Regardless of the upper deck design, the lazy susan belly pan shouldn't be affected by any of those changes.
The aluminum diamond plate seems to be working well fer the truck belly pans. I'll will have to build a simple circle cutting rig to cut the lazy susan belly pan out.