I own an o2DS and it works well as a replacement for the original Luma3DS, allowing me to automatically disable the annoying LEDs. However, there is one major problem - the "onscreen volume controls" kills your sound. Now my volume slider doesn't work, and the only way I can see of making it work again is manually mapping every single position to a software volume value (a massive waste of time, since it worked fine before). If there was a way of resetting the volume slider to work as normally, I'd be happy.