First you need a TR9 screwdriver. Take off battery cover and with a flat head screwdriver take off the little sticker in the bottom of the place where you put the battery. Take your TR9 screwdriver and remove all the screws from your controller, the last screw it's covered behind the sticker you have just removed. Take a screwdriver and press the back off your controller to remove one side of it. Don't press to hard or you will break the controller. Push the side you have pressed with the screwdriver to remove the back side of your controller. Put the rumblers on top of the board and remove it.