i wanted to make 2 wooden control panels. one with a trackball and a spinner and one with 2 joysticks. I wanted to build the panels to fit onto the cab without altering the cab. i can't bring myself to destroy a classic cab for a mame machine. i've seen a lot of people build these gigantic control panels and then have to play their games off to the side, I would use two interchangeable panels so you can look at the monitor straight on.