Yes I have had rods warp, both composite and glass. I've seen many blanks that were warped too, they had sat leaning in a corner for a couple months. So, now I use racks for every one. The Berkelys are only like $10 a set. And, if you buy their vert/horiz. ones you get two for one. I use two, each about 4 feet off the floor. I think each one has five slots, but without reels you can fit at least 10 in each mounts. I have maybe 15 rods in the two of them, half the rods have reels too.

Amish Ed