Is Aeropoxy a methacrylate adhesive or epoxy based. My local composite material supplier has a number of industrial adhesives in tubes like Aeropoxy. If I decide to try it what should I look for?

How many guys have suffered structural related crashes due to a glue joint letting go as opposed to just poor design (insufficient spar for instance)

Not trying to be difficult but this is an expensive hobby already and I would like to know when enough's enough.