Oh, hey! I never saw this thread. I did the Walmart pizza caps as well. I secured them with Zip ties after failing with every other idea. Right now I have no access to the valves, but I'll add a hole and valve extenders in the next few days. At under $4 a wheel, they're quite the bargain. I'm going to see if I can polish 'em up next weekend. By the way, they're not aluminum - they're steel, as my magnet accidentally discovered.
