I've tried a couple of profiles with centered deadzones, but never found one that gave me the high degree of panning that I needed in CoD. I returned to Charvel's profile that does provide huge deflection with small head movement, but can be twitchy, especially at 30 POV (ie zoomed in for precise aim).
I have two buttons assigned on my joystick for TrackIR: CENTER and PAUSE. As I near my target I zoom in (30 POV), CENTER the gun sight and *immediately* hit PAUSE. The gunsight now moves very little, if at all, and you're good for shooting -- the danger being that you are target fixated so don't stay "locked in" any longer than to take your shot.
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