I've noticed that no matter what value my New 3DS XL's super-stable 3D is calibrated to, it always looks slightly off (as in a very faint double image of the screen) when the 3D depth slider is all the way up and I'm using System Settings. my system is dual TN, and I've also figured out that values 1.0 to -0.5 look the same altogether, while -0.5 to -1.0 look more off. Which calibration value is best-looking for me?