I am going to be building a 4-player MAME cabinet for my wife and I here shortly. It will feature 4 (8 way) joysticks, 6 buttons for each player (so fighters work properly), a shift button, an escape button, 4 start buttons, a coin button, a trackball, and an anaolg wheel. The question I have is: The requirements here exceed the amount of available slots on the Ipac4. Would I be able to use 2 Ipac4's or would they interfere with each other? What would be the best way to handle this? Money isn't a HUGE deal as it will be a project over time. The goal is to have it finished by Christmas as a Christmas gift for my wife. Before you ask: Yes she knows and yes she is excited. I landed a good one.