FYI... got these done a few weeks ago, and they have worked out quite well
Used a melamine serving tray from KMart (fairly light weight compared to pizza pans) ($4.99 ea):
Drilled out the acorn nuts and epoxied in some smaller nuts inside:
Drilled 4 matching holes into the serving tray, hot-glued washers and spacers so they don't keep falling off during the mounting:
Initially, the tray was a little big and rested on the edge of the rim:
I didn't like that, so I sanded the edges of the tray down until it fit exactly inside the edge of the rim:
Final look is pretty decent; plan to also sand down the ridges so the whole 'bottom' / outside of the tray is smooth, and then will likely paint them. Also plan to smooth the edges of the washers so they don't present such a sharp edge:
For these covers, I prefer to remove the clip-on weights and have the tire shop re-balance with the stick-ons so that I don't need to cut notches into the covers just for the weights. Since it's a relatively quick 4 phillips screw on / off process, and since the tires are holding air really well, I'm not too worried about having an opening for the air valve.
EDIT: Posted this into its own thread at
http://ecomodder.com/forum/showthrea...ers-14306.html