Placement of buttons on multicade

I just converted a hacked scramble cabinet into a 60 in 1.
I was thinking of having the joystick and trackball on the top of the control panel and the shoot/jump buttons on the side. I thought about putting the shoot/jump buttons on each side of the control panel so the player can choose which side they want to use. I guess the 1 and 2 player start can go on top.
Any thoughts on this setup.