What is wrong with the wing tube? Are you talking too short or the foam cores are cut wrong? Well I will tell you for the short tube I got an extra piece from Gator RC for the fuse. As for the wings, don't know if people didn't think of it or mine was the only one but they were cut upsidedown. In other words I just had to flip the cores and I had the correct taper of the top (flat) and bottom. Then I just adjusted the ply root rib for the new cut out locations and built normally from there.
Good luck it is a great flyer.