No, it's not caused by warping. I went over it time and time again and there's not so much as a 1mm varience anywhere. It's basically caused by the fact that I've got so much weight hanging off the end of it, extended out so far and I think my bolts just aren't high enough quality. I've got some very tiny leaks that I just can't seem to rid myself of. Oh well, it's not bad enough to hamper performance or be obnoxiously loud.