My feelings too, which is why I only used on strip of regular packing tape underneath. Pretty light and if you don't want it there anymore, you can just pull it off.

Packing tape strengthens foam more than you'd think. Try it with a piece of foam laying around the house. Tape one side of if and you'll find it breaks easily one way, but not so easily the other. The way it is strengthens is the way you need strength added to the Estarter fuse.

GWS glue is great glue! Epoxy is very heavy. In the 60+ hours my Estarter has been in the air, never has a GWS glue joint failed. If you treat it like contact cement, letting it dry some before putting the parts together, it works fast. If you put the parts together while it's still wet, you have quite a bit of time to move the parts.

Use epoxy where the instructions tell you to and only use as much as you need--the exception the landing gear area which needs to be filled. The only thing I regret about my build is using too much epoxy in the tail. My surfaces didn't fit very well so I loaded them up with glue to make sure they'd hold. If I were to build another, I'd take some time cutting and sanding to get the best fit and then use polyurethane glue with the parts sprayed lightly with water to ensure I'd get a decent amount of foaming. The foam would fill the gaps and be lighter than the epoxy. You have to watch it though to wipe off the ooze regularly though, which is the only drawback.

Really, though, a bit of weight in one place isn't such a big deal. It only become a problem when you start adding too much weight in a lot of different places.