I'm telling ya you don't need a diagonal stick, but say la v. The feel is better with leaf switches though.
Email me privately and I will email you the CPO artwork in illustrator format so you can tweak it as you please and check and make sure that it is the right width. When you are ready to print, go to Scott at MameMarquees.com. He has already adjusted all of the colors for the control panel.
I have 3 buttons for various shooters that use them. Plus "Punch Out" requires them. Joysticks are pretty cheap. I would get some new ones if you can swing it. The switchable ones are really nice cause there are plenty of shooters that need 8-way. But if you are strictly Donkey Kong, Galaga, Frogger, Pac-Man, then you obviously dont need them. Are you going to keep the real arcade monitor?
peace