For my gear cube the center caps tend to pop out alot, would super gluing them work? If anyone has tried this can they tell me if they have had success with it?

Super glue would work on any cap. Just make sure the super glue doesn't go down into the actual screw or it would restrict movement. If you do happen to get some under the screw, just keep turning that layer for about 10 minutes and it will dry and not bond. You would only need a very small amount to keep the caps held in.

An old trick that I think may work, put a bit of paper under the cap before putting it on.