Drilling into the 4x4's gave me a little trouble (density), but otherwise it went pretty smooth. So less than $30, and a couple of hours on a sunny afternoon, and now my boats are well off the ground. As an added bonus, the rack will double well as a work horse and surfboard ding-repair station in the future, and there's even enough room for another boat (like I've got the $ for that). All I need to do now is pad the beams with carpet or foam and I'm good. Cheers.