Decided to get the control horns onto the elevons. But first! A test of the glue. At the hobby shop, I was recommended that this, Foam Tac, as the best option to use for joining foam together, as well as a myriad of other things to foam. But before actually using it on the wing, I tried it out last night on some scrap wood and epp pieces.
The result? It's a daaaaamned strong join! I even tried gluing a piece of epp to a zip tie - the epp broke off before the glue joint was compromised. So yes, it appears to be bloody strong, but I'm not the strongest bloke.