Yeah, nice brewstand! It's nice to see someone else using the same manifold idea I did: build a manifold that has gas in and gas out, then using copper tubing to go from the manifold to the burners.
Check my manifold out. Just click on the brewstand link in my signature.
I have the brewstand powdercoated green, so I wrapped green electrical tape around the manifold (and the flexible conduit and the j-box) to match the paint.
I also used compression fittings with no problems and have needles valves after the ball valves. I made the piece of copper tubing between the needle and ball valves so short that you can't see it.