How 0, 0.1, 0.2, .... 1 in game FOV adjustments correspond to degrees. Any conversion formula? I got mathematically correct FOV degree from http://www.projectimmersion.com/fov/index.php?m=1 and not sure how to apply it. Should we still use old cfg files trick http://www.projectimmersion.com/fov/howto.php?g=DR? In game setting work, why bother?