They sound like the wico ball tops. Are they leaf or micros?
btw, using used joysticks are questionable. Joysticks can loose their feal pretty easy. I was going to do this, but then realized that joysticks are 10 bucks and are the cheapest part of my project.
So I bought 2 new joysticks, and used the best of my existing joysticks on player 1 and 4. But I have to say, my 4 joysticks that came with my cabinet. 2 sucked! Really hard to move, the springs to center didn't work, crap fell out...
btw, go to the oscar site and read his joystick reviews on what to get. Supers are nice for some games since it allows you to rotate them easier in circles (timepilot, gyruss) but competitions are better for fighting games.