[sassgrunt]

An easy (and cheap) way I've found to cover the hole in the center of the hub is to use small chrome caps. They have six small pointed 'arms' that stick out from the back, and you can bed these out a little to snugly hold them in place on the rim. It's been awhile since I bought any at the hardware store, but they were around 3/8" size and I'm sure cost less than $1. -Mike