I am in the process of making a control panel as well. Except I only have 34" of space and it will be a 4P control panel as well. I'm going with only 6 buttons for the middle 2. Since the only modern fighting games I'll be playing are Marvel vs capcom 2 and Soul Calibur, I don't need that many buttons. Most of the other games are console 1-2 player games, with the occasional 4 player game that only needs 2-4 buttons like ninja turtles, simpsons, battletoads, etc. I am a noob at this but from everything I have been planning out while waiting for my control panel parts to arrive, 8 buttons kinda seems excessive but should fit. Hope the people using them are skinny tho!