Granted ,that bend is a little excessive. But, I would think alcohol & water & a couple of days laid flat with weight should take care of it . The alcohol makes the "water wetter" & will also make the mixture evaporate faster. I wouldn't think the manufacturer would do anything, one reason, it's a very simple fix. Some pieces of wood will bend one way or the other when exposed to humidity & heat. Just dampen the offending pieces, lay on a flat surface with heavy wieghts & let set for a few days. Go ahead & build your wing. Good Luck !!