I would reccommend letting the companies know if you are having problems with their wood selection. I know that sig has someone look over every kit before shipping, and I would assume that this is the same for every company. There is something wrong if a fuse is wavy, and this needs to be corrected by the company.

I realize that this sucks, as you want to build, but your plane will thank you when it is in the air, and hopefully the company will thank you for improving their QA.