As far as the dual sticks... that was just a personal preference.
I made sure to lay everything out to minimize any issues with being in the way of the ball. The ball was more important than dual sticks.
So if the ball would have been impacted, I would have removed the 2nd sticks from the panel.
I know games for that are limited, but I really wanted it. I love dual stick games.
(I texted my kids at home to try to snap a picture of the control panel and machine for me...)
The only time the buttons left of the ball are used are for windows use and missile command... (well, and to rotate left/right for golden tee)
Other than that, the 3 buttons do not cause any issues. does not affect my front end. using 3d Mame front end.
I have it set up to work with my 1P stick and buttons to walk around the arcade and click on a machine to start.
I'm just throwing ideas out there to think about.
That's all.
Lordoxide's layout is perfect if that is what he wants.