Question for the wood guys: I'm trying to track down the appropriate wood lengths and am having serious trouble finding longer lengths in non-timber/stud wood. I'm trying to find square edged wood vs. rounded dimensional. Any suggestions as where to find that kind of wood beyond a true lumber yard? I'm kind of stuck here. I've given up on finding a higher quality 4x4, so I'll likely be bonding two 2x4's to get that size.