The spinners are too close to the buttons, they are a lot larger underneath.
Player 3 would have his elbow in player ones side constantly (as would player 4 to player 2 to a smaller extent.
I would personally forget about having 4 players and go for 3 instead. It would be much less cramped.
Then I would do the stations like this.
Player 3 - leave where it is.
Player 2 move over to where player 4 is and change to a top fire.
Player 1 stick right in the middle where the trackball is now.
Move the trackball between player 1 and two.
Put the 4-way between player 3 and player one. That allows the 4-way to be accessed much easier and share buttons with player 1.
Ditch the second spinner altogether and move the other one in between player 3 and the 4-way, or leave them where they are (which is right for tron and rotary joy games, but wrong for everything else as the regular buttons are not really easy to hit).
That layout would be much more playable. You would lose the ability to have 4 people play at once, but how often would that really happen anyway? (it would be really cramped on that panel).
Oh, and you can put pictures directly in your message, like this.
