The Trackball panel
This panel is for games like Centipede, Millipede, Missile Command, and Marble Madness. It’s pretty much a generic trackball panel.
I had to abandon my traditional button layout on this one. Basically, in order to let players decide which hand they like to use for the ball and which for the buttons (think Missile Command), I needed to have three on the left that were different than the three on the right. That way I can map them appropriately and independently in the games.