1.Go into your settings where you can change your look speed and deadzone.

2.Change your look speed to 20 [Max] and your deadzone to 0 then press O twice.

3.Go back into your setting and decrease your lookspeed by four and increase your deadzone by 4, press O twice again.

4.Now go back into your settings one last time and increase your look speed by 4(you should notice a gap between 19 & 20, that means your look speed is now 19.5) now decrease your deadzone by 2 and press O twice.

You now have a look speed of 19.5 and deadzone of 2, have fun owning, and be prepared to be called hacker.
idk who found this but its supposed to make you uber pwnage without using any codes and such. Have fun, really easy and quick to do!