How I replaced the thumbsticks to fix drift issues on the Valve Index Controllers. You follow this at your own risk. There is a chance you can damage your controllers trying this procedure. You can overheat the board soldering, you can snap the cover, you can break a ribbon cable, you can loose a screw or a spring, you can get chip-quick on the wrong components, you can use too much flux. Understand you can break your controllers if you do this wrong.
Thumbstick is available on AliExpress, part # FJ06K-S
![](https://i.ytimg.com/vi/oDngL_xFFyQ/maxresdefault.jpg)