I went the other route with my MiniPAC and maxed out the buttons available. I have 26 buttons - 2 x 6 button Street Fighter layouts, a coin & start for each player, 2 pinball buttons on each side (total 4, not shown), L & R mouse buttons above the trackball, then 4 x menu buttons for exit, menu, pause, and HyperPause. I realize that a shift button is available and I could have less buttons but I've been happy with it.