Yeah, me too (not for '63), anyway is simple, run fust and spray, then you can edit multiplayer cfg. You can adjust speed, aim down sight and get low recoil/sway.
You can see wath i use (download my last cfg), but you cant make cfg read only now or game will use basic setting, anyway will not change value, now i cant see fov changer in game client but, seta cg_fov "80" seam work. Some time you need to ad again value maybe after game launch.
So you can slow mouse movement (raw imput) and fast your keybord movement to get better soldier speed and precision.
let me know..