Hi everyone! I'm working on my first DIY arcade with my son and would like a bit of advice on the buttons and layout. We decided on a 4/6/6/4 layout for our buttons, a trackball, and USB ports on the sides for our Sinden light guns. However, I'm seeing lots of arcades with different admin type buttons at the top (start, menu, etc.) Of these buttons, which do I actually need? I saw this layout by Phantom Arcades that might be cool to mimic, but the buttons up top may not all be necessary. Any guess on why each set of controllers needs two buttons above it, and the three in the middle?