RE: anything wrong with carpenters glue for joining wings?
a tubular or rectangular section called the wing tube carries the main load inconjunction with bolts or elastic bands. It matters not what glue you use here. Wood glue is fine if you allow for proper ccuring period.Same counts for the tailplane which is usually screwed down as well as bonded.Horizontal stabilisers do require high strength glue and epoxy fits the bill. Contrary to popular belief, the longer cure epoxies are more suitable not for higher bond strength but due to greater flexibility and vibration damping.