Ok, I think I get it. Presently since I'm more concerned about heat I should apply the Henry coating to the roof, install the Maxxair vent/ceiling fan, rig up an awning system (treated white canvas) that starts from opposite side of side door side, spans the entire roof (1ft between canvas and roof) and extends and slopes maybe 10' out from the side door for ground shade, try to park in shade, and wait until fall to insulate with polyiso, since what I have read so far, the insulation will eventually trap heat in the CT....better for winter application or if I was running AC? What do you all think of gluing or sewing reflectix on the canvas part over the roof facing up of course? I'm going to figure out an almost free floating awning support system using pvc pipe, nuts & bolts....no glue quick easy set up/take down. No attachment to CT except underside frame. At least in theory I think it can work.