I recently felt the need to replace the ailing buttons and joystick on my Hori Fighting Stick EX2, so I got the required materials and did so. Following the instructions here and here, I went about the task. What I did was replaced all of the original Hori buttons with Sanwa OBSF-30 buttons, colors yellow, orange, and vermillion and the joystick with a Sanwa JLF-TP-8T joystick. The end result is a much snappier feeling joystick, without buttons that stick when you press them. Also, Zangief (drawn by Gabe of Penny Arcade, scanned from Street Fighter Tribute).