That's an awesome looking cocktail! I actually thought of doing one very similar a while back while constructing my cabinet. The only difference is mine was going to have all four sides used, with different control layouts, very similar to what the rotating-CP-making members have done. Instead of rotating, you just walk to different controls. For instance, one side could have 3 4-ways, two in normal fashion, and one in Q*bert configuration. Another could be in fighter configuration. And so on, etc. I also wanted to have a omni-directional frontend so that you could choose games from any side without extra walking around. Feel free to use any of these ideas, as I've resigned this idea in favor of a full-size cabinet.
-Matt