The more I use Polyurethane glues, the better I like them. I've pretty much quit using epoxy. You can use an incredibly thin skin of this stuff on any kind of joint you can clamp (or otherwise prevent from spreading apart when the glue expands) together, spray a little water on it, and you'll have an extremely strong bond with much less weight than you'll ever get from an epoxy joint. I use Elmers Ultimate...Lots cheaper than Gorilla Glue. And I've started using polyurethane varnish for fuelproofing firewalls. Epoxy is just too heavy, and you'll be rewarded for every ounce you can safely shave with better performance.