Sanwa's latest upgrade in silent sticks uses a pcb and Omron D2RV-G-SD3 reed switches with an upgraded restrictor plate to give the best performance and almost no sound. 

5 pin wire harness sold separately. 

*** Sanwa uses Loctite to the screws on the joystick to secure the mounting plate. The screws are easily get stripped if you are trying to swap the mounting plate. We recommend using the JIS version of Phillips drivers or removing the Loctite by using a heat gun.