I've built a couple, they're pretty sick to ride knowing you've got something unique under your feet. I highly recommend baltic birch, It's a strong plywood that still has a bit of flex to it, I'd suggest using 1/2" 3/4" ply depending on how long of a board you're wanting to build. also i use minwax spar urethane glossy finish for the cover and also get traction sand for the grip, I like it better than using regular old grip-tape, looks and feels better if you ride barefoot. pretty simple application proccess, apply a coat of urethane, let it sit for like 20 min, loss sand on top evenly, apply another coat to board (bottom side first so you don't get sand on it) and let it sit for at least 24 hrs. drilling holes is the hardest part but just measure everything out make a template even.