The green button is the pause/exit button, I use an autohotkey script so that a quick press will make it pause, but if held for 3 seconds, it exits. This works very well on my other cabinet.
The other four buttons along the top are the start buttons. I have 4 black player start buttons, I'll remove the centers of these and put them inside the colored buttons so they will be black in the center with colored outside rings matching the player controls. I'll then use the remaining parts to make four black buttons with colored centers to use as coin buttons, which will be mounted not on the panel, but on the edge of the box below the panel.
As for the trackball, I do eventually plan on a green glowing translucent trackball. (I told my wife that is what I want for Christmas) right now, I have a 3" white wico trackball that is collecting dust in my basement. I pretty much exhausted my budget on this cabinet, and side we are expecting our fourth child at the end of this month, I don't have any extra to spend on a new trackball right now.I figured since I am using a trackball mounting plate, it should be relatively easy to swap out the trackball once I get the new one.
I made a full size mock up of the panel, button and stick locations all feel good. The layout is almost identical to the 4 player showcase cabinet I just sold, so I know it works well. This panel is 46"wide by 18" deep.
I'm still consideringa dedicated 4 way stick, but I'm not sure.I'm using ultimarc j-sticks, so it is easy to lift the panel and turn the restrictor if I need to. And I have another cabinet set up with a 4 way, trackball, 3 buttons and a vertical monitor, so I'm not sure it is necessary. Opinions?