For those of you specifically searching for how to Modify the Xbox Hori Tekken 6 Wireless Fightstick
Here is my first modified stick. My goal was to have a wireless, power controlled switchable 4 to 8 way directional fight stick, so I used an Xbox Hori Tekken 6 Wireless Fightstick as my base. Got all my parts from ebay, focus attack and Ultimarc and then I had to figure out how to modify the case to get everything to fit properly. The final product came out exactly as I had hoped. This joystick is perfect for switching between my favorite games like Donkey Kong and Street Fighter. Anyhow, Hope you guys enjoy. Please give me some feedback.
http://i.imgur.com/Fb0qavl.jpg
Here’s a list of the parts I used
- Ultimarc ServoStik - Powered 4 to 8 Way Switching (Sanwa JLW)
 - Sanwa OBSC-30 Translucent 30mm and 24mm Buttons
 - L298N Dual H Bridge DC Stepper Motor Controller
 - Three-Way Toggle Switch
 - Two-Way Toggle Switch
 - 9V Battery
 
I Attached the JLW stick by removing the base plate that came with the joystick, and simply mounting it directly to the Hori Joystick Metal Base Plate
http://i.imgur.com/PzOZMyS.jpg
Here’s the innards, The inside of the stick is very crowded with little to no extra room. The added Stepper Motor, Servo, and 9V Battery take up a lot of space, so I had to improvise and try out a few different configurations. Here is the final result. I had to put the stepper motor on a piece of cardboard that flips up as this was the only configuration that would fit inside the controller. I used 3M tape to mount the cardboard to the case and screwed the Stepper Motor into the cardboard.
http://i.imgur.com/mT6GMnr.jpg
Close up of the Servo 4 to 8 way switchable setup
http://i.imgur.com/oz5Xgy5.jpg
Stepper Motor and switch setup
http://i.imgur.com/qncCqFE.jpg
Flaps closed and ready to button up
http://i.imgur.com/0HxbhXa.jpg
Here is a side shot of the toggle switches I have installed to control the servo. You simply flip the switch up for 8 way direction or down for 4 way direction. Push the button to activate the servo.
http://i.imgur.com/IZtFjn2.jpg
Also a very great modification was to add some rubber feet to prevent the controller from slipping. So I bought these stick-on rubber pads from Lowes
http://i.imgur.com/nLoFWwY.jpg
Video on the servo in action
http://www.youtube.com/watch?v=G_qGCXrefUw
 Also if there is anything else i should know or to take care of;-)