I agree. Give a call to GP and ask them. Be sure that your spars are straight. GP will probably just send you another set of ribs. I doubt that it is a problem with this kit as a whole b/c there have been tons of them built without any problems that I have seen on here or anywhere else. GP is a great company to deal with. I will let you know what they did for me sometime. AnneMarie and the gang at GP will always get my vote.

James