M.T. not to start a "debate" (lol), but anything used to attach the foam together causes your knife to slow down when carving. I've tried it all. Of course stuff like hot glue is going to be 100X worse. But, even the thin layer of spray glue or lacquer thinner isn't perfect when compared to a solid block of foam where the knife slides through like butter.

Monty, you can cut pieces of cheap, aluminum flashing to get that curved affect if you wish. I use the stuff on my gills when carding. With the fins and tail I have the ability to put curvature in them after the fins dry with the fin backing method I use. But, flashing could be used here as well for those that use silkspan and have to put the curve in before drying...