A dual strike has 13 buttons in addition to the 2 analog pots. I plan on using 4 dual strikes (1 for gas/brake, 1 for yoke, 2 for recoil guns). That's 52 buttons which would be enough for all my other controls. The buttons work very much like a keyboard matrix. Here is a modified schematic from 1up's site. The up/left/down/right buttons on the dual strike are fired by shorting wires 12 to 9, 12 to10, 7 to 10 and 7 to 9 respectively. I thought I could get by without a keyboard encoder. Unfortunately, the P360's are a problem. I was hoping there was a trick to making 'em compatible.