I've been flying mine for over a year with a Saito FA-100. Only one rib was broken and it did not appear to be a structural problem at the time I assembled the model. I flew it for over 6 months with the broken rib. I then contacted Horizon and requested some Ultracoat Transparent Yellow so I could repair the rib myself. They sent me an entire role for free, no questions asked. I sliced out the covering between the 2 ribs, CA'd the broken pieces together, and recovered it. If you look carefully you can see that it had been repaired but you have to look real close. Since I repaired the wing I've flown it an additional 9 months.