One trick you can try, if you can still get to the joint, is to apply a thick bead of hot glue along the opening of the joint to re-heat the glue inside, then using some scrap foam (cut several scraps before you start) scrape as much of the new glue out while reshaping the joint. just be careful to keep the glue out of the notches for the power pod (on the speedster you can cut the glue out before you install the turtle decks, but it's a pain to do).
Keep in mind, the top will be covered by a posterboard turtle deck, which will hide a lot of this. Looks are nice, but the big concern for flight is keeping alignment between the wing and the tail. Ugly planes still fly beautifully
Good luck, and Welcome to the forum!