First thing to do is check the 'Head View' and tracking views in the TrackIR software.
You'll get a better handle on how the tracker is working.
if the head graphic isn't moving far enough in the set-up, tweak the response curves untill you get the movement you want.
make sure the IR targets are visible for all your head movements. Adjust your reflectors/clip until this is right.
Get it wrong in the software set-up and you're on a hiding to nothing
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