The wings are presheeted with 1/16" balsa and are not reinforced (no wing tube, no spars, no CF) and I'm not sure you can effectively reinforce it without gutting the wing panel.

Great kit, BTW...I've been on business travel much of the past month and haven't had a chance to finish mine up, but I hope to get back to it in the next week or two.

I did wind up with 2 right wheel pants and my cowl doesn't fit either, but that's the fun of building, right? I've got a replacement wheel pant on the way and I'm still figuring out the best way to mount the cowl...it's not off by much (a 1/4" or so), so it shouldn't be too hard.