I have the rotations registering as buttons 8, 9 and 10. So, at any given time this joystick is transmitting either 8, 9 or 10.
This isn't particularly useful, because MAME needs clockwise and anti-clockwise signals sent.
So... I wrote a program to do that too ;D
http://shmups.system11.org/viewtopic.php?f=6&t=43706

And here's a shot of the inside for those interested.
