The buttons at the bottom sides are for pinball. What do you think about the overall placement?
Try putting the flipper buttons about 4" from the front edge and 2" from the top edge.
This will allow your thumb and 1/2 of your palm to rest on the top and let your fingers reach the buttons.
If you place the ball launch button 2 1/2" from the right and 1 1/2" from the top, you can launch the ball with your right thumb while keeping your fingers on the flippers.
Try this on a cardboard box first to fine tune the exact layout for your hands.
The only thing I would add is another flipper button on each side, located about 5 1/2" from the front edge and 2" from the top edge. This second flipper button will be for upper flippers and Magnasave. Some tables have separate upper flipper controls like the Family Guy table with Stewie's playfield, while others have Magnasave. The good news is that I can't think of any tables that use both the upper flippers and Magnasave. You can just wire left-upper-flipper and left-Magnasave together and trigger both keypresses ("A" and "L-Ctrl") with one button. Same on the right. (Apostrophe and "R-Ctrl")
Assuming that you're running Visual Pinball or Future Pinball:
Wire the left flipper in parallel with Player 1 Button 4. (L-Shift)
Wire ball launch in parallel with the Enter admin button. (Enter)
Wire the left Magnasave/upper flipper in parallel with Player 1 Button 1 and Player 2 Button 1(L-Ctrl and A)
1. I have now added admin buttons, but I'm still wondering about the mouse buttons. Is there any other usage for a third button in the middle, other than as a third mouse button?
Admin and mouse button choices look excellent as is. No need for the middle mouse button.
Scott
EDIT: Just realized that when I posted in this thread, I forgot to attach the diagram for how to wire P1B1 and P2B1 in parallel to one button for left upper flipper/Magnasave while still allowing them to operate independently.

My apologies if this has caused any frustration or difficulties.
