A couple of ARFs I have built lately said to use CA on the tail feathers, but I stuck (no pun intended) with epoxy. If it is a good tight joint, I don't see why ithe waterproof wood glue wouldn't work just fine. On some loose fitting joints I have used polyurethane "Gorilla" glue with good results. I do agree with the epoxy on the wing joint. I have seen some come apart that weren't properly joined in this area.