Hi, I'm currently in the process of planning out the control scheme for my first system, and I do know I'm going to go with at least a two player cabinet. I've never really been a fan of trackball arcade games(They were simply never around anywhere locally for me) so i'm a little bit uncertain as to how I should go about this. Do most trackball games only use one trackball that is alternated between two players(if the game is two players) or do I need to purchase two individual trackballs for each player? I do definitely want to include trackball games not only for myself but my friends who are fans of them, and playing these games on a joystick just wouldn't be the same. It may be a silly question to you guys, but it's something that'd save me a lot of concern. Thanks in advance.