I've been testing around different sens for some clip lineups.
I tried sens 4.977720 using cheat engine because according to the calculator it should give me 2pixels/count at 86fov. I looked at a specific pixel and did a 360 spin to see if I could still line it up but it didn't work, it would always shift 1 pixel after doing a 360. If I instead use 5 with cheat engine or ingame, I can line it up after every spin.
Either I'm doing something wrong, or the calculator is off