I've always though that trimming the back wall off and reattaching it would work, but the challenge is not making it look like ass. A good start would be identifying the material. Based on that, you can choose the joining strategy. Finally get some junk flares to practice with. I've gotten over the gap, but I have black on black on black... So it's not as noticable.It certainly will bother me. If Blaine hasn't solved it, I don't believe I will. That said, I'm not giving up yet!