ORIGINAL: BillinIndiana
Now after a few others have said to use the Epoxy on the wing spars, I wish I would have went with my 1st instinct and used it there no matter what the plans said...
I think the people telling you to use epoxy on the spars are answering a different question.
Or maybe I'm misreading.
In the steps where you are gluing the ribs to the bottom spar, and gluing the top spar into the the notch at the top of the ribs, you want to use wood glue or CA.
When you get to step 44, gluing the two wing panels together, you need to use epoxy. If you are going in order, that is the first time you need to use epoxy.