As I've been building my collection of tanks and rdas, I began to realize I needed some way to keep my gear stored upright. So my solution is a really simple one. Just go to a store and ask for a small box. In order to create the holes for the 510 connectors, I simply press the connectors into the surface to make an indentation, and then bore it out with a philips screwdriver. Then I press the connector down in. After a few times, it is smooth as can be.