Hey Guys. I'm taking a Nitroplanes Cessna 182 and making a 180. As we all know a 180 is a fast back, where as the 182 has a window in the back. My fuselage is Epoxy Fiberglass. I was thinking of gluing some foam on, then shaping to the correct outline, then glassing the whole thing. What would be the easiest foam to work with? What type of epoxy should I use?