My panel is 26" X 11" and it incorperates 2 T-Stick pluses with 7 buttons each, cap com/neo geo layout, a 3" happs track ball in the dead center, and on top two mouse buttons, two administration buttons and player 1 and 2 buttons. I feel the layout isn't crowded and is comfortable without being overly large. I'll take a look for the layout template when I get home and send it to ya, but I pretty much just took "Thejohn"s layout from his centipide cab and used it for my own. Take a look at his cab in the project anoucment section. If your willing to go to 16" deep on your panel you should have plenty of room for what you want. About spinners, read the retroblast review and make your own decision, the slikstick sounds like it's the best, but if your using a Optipac for your trackball you won't need a spiner witha built in interface and I would go with Oscar's spinner. Hope this kinda helps.