Did the epoxy set up hard, was the joiner to long and held the wings apart a little? , either way I agree that carefully lifting off an inch or two of econocoat covering and glassing with CA and fiberglass cloth will relieve your anxiety,you can recover the center on the bottom of the wing easy enough, and it doesn't show much anyway. This is a fine bird and you will enjoy. I have one with a Saito 72 10x6 APC RD6000 with expo and flaperons that is a blast. Cuda