Alrighty, so I have counted my buttons so I'll break it down, let me know if you see anything I might want to change:
Player 1:
6 red buttons
1 mag-stik plus
player 1 start
1 orange button for coin
Player 2
6 blue buttons
1 mag-stik plus
player 2 start
1 orange button for coin
player 3:
4 black buttons
1 mag-stik plus
player 3 start
1 orange button for coin
player 4:
4 yellow buttons
1 mag-stik plus
player 4 start
1 orange button for coin
At this point, i'm not sure if I want to add a trackball yet or a spinner. I'm mainly going to be using fighting games in it. So no use in buying them. So if I buy all that i'm at $259.40 + Shipping from Ultimarc. Starting to ponder if I just need to buy 2 dedicated 8-way sticks instead of a mag-stik plus (switching) because they'll only be using 8-way controls, unless there's a 4-player pacman game LOLOL j/k. Anyway. I found a 4-player coin door from happs that I'll buy, but I'm not really sure about how to wire it up if I want to actually use the coin door. I'll do some more research. I think I saw a thread somewhere about how to make it work.