I made a 12 sided box for my daughter with the grain running vertical in the 12 sections. The lid fits inside with a lip over the top. The lid fits very snug. It is also 12 sections with each section running to a point in the center, grain running outer end to center. I live in the desert side of Oregon where it is VERY dry. She lives in the "Rain Forest" western side of the state. My question is, will the lid get tighter with moisture or will the expansion of the width of the side sections be greater than the expansion of the thickness and make it a looser fit? Opinions?? Forgot to mention, each side section is aprox. 2" wide by 1/2 thick, all joints glued.