Why don't you just use the "traditional" adhesives/glues that have been proven successful for decades?

Here's what I use:

"CA," Gap filling and the thinnest one.

5 minute Epoxy.

30 minute Epoxy.

Certainly other items can be used, for other tasks, that follow the basic framing up of a balsa and plywood model.

Hope this helps, but my guess is this will be a long Thread.