I have a set of Powerblock dumbells that I store on one of the Powerblock Compact Stand. This stand has 4 circular cutouts to hold the 2.5 pound cylindrical weights that are normally held within the Powerblock dumbells. I wasn't happy with how shallow these cutouts were, and was concerned that a child or my dog might knock them over and injure themselves. 

So I made this small support that holds these weights securely. I epoxied it to the stand. It's held on very securely, and there is no way for the weights to fall over now.