I'm emailing with Andy (who is great) but I figured I'd post here and see if anyone can help. 
I have my arcade setup, it's working great but I've got a couple of issues: 
1. The player 2 joystick is assigned to the 'R' key. Unfortunately it's not working. When I press 'R' with the keyboard it works fine but not with the joystick. The wiring seems to be fine. 
2. The shift functionality isn't working. (This isn't a big deal and I can live without it but I figured I'd bring it up in case it may be related to issue 1.)
If anyone has any suggestions, I'd love to hear 'em. I can't wait to get some SF games going...