AR, we found the household iron really flattens out the seams ...the strips under should be hardly noticeable , the thicker the canvas and all ...
We know now the kerfing method works ... and the idea of wooden spars still seems like a good idea , as a place to hang lights, maybe a cargo net , etc. no having to put "hard points" in the side , although that's easy too ...not to mention the increased roof strength... not much extra weight , really ...
Ps. I trimmed my bubbled Gorilla Glue with a cheapie serrated kitchen knife retrieved from the kitchen junk drawer... works super , flexible blade gets next to the foam so you can saw off the protruding bits flush ...
Just another thought ... for a bigger foamie , it might be Good to use fiberglass for that reinforcing strip on the floor/wall , then cover over that ... Strong , and it has a nice edge already ... Wonder if it comes in 12" wide tape ??? Yep it does...
http://www.aeromarineproducts.com/?gcli ... 7QodURuRqA Anybody want to split a roll... it's 50 yards long
