Nice job!
If I am seeing correctly, the barrel rack is made sloped up slightly as you go away from the spigot. That makes perfect sense to me. In the middle pic, the valve is flanged onto the "top" of a barrel, but I don't see a horizontal barrel. I'd love to see how that transition was made, too.
I plan to add a water collection system to catch my garage roof runoff when the garage is completed and I come up with enough money, so I plan to sincerely flatter someone and steal, er - imitate their design.
