RE: anything wrong with carpenters glue for joining wings?
Not good. In high school, I helped my friend build a Falcon 56 but I did not know he used wood glue for the center joint and tape. Tower/ Kraft 5 channel radio and a K&B front intake/ rear exhaust .40. That rear exhaust engine blew the exhaust right on the wing joint, and on about the 8th flight while making a gentile turn, POOF! Houston we have seperation. The next plane he built, we made a 8" wing joiner, even though the plans did not show it because we were not going through that again.