I have a TIR4 that I bought a year ago but only used it for a week. I was having problems trying to look behind me.
I found that if I reset all the custom views for a plane using the "home" then "F10" keys for each view, then the trackIR panning was nice and smooth, but it was really hard to look around the headrest to see behind me. I would turn my head to see the 6 view, then when I tried to lean to see around the headrest the thing would stop tracking and get stuck.
If I set custom views so that the back-left and back-right views already looked around the headrest then I found that trackIR seemed to "snap" to those views instead of smoothly panning with head movement, which I found really annoying.
I could never get the right setup so I gave up after a while, and went back to the old left hand on the numeric keypad for views.
Do you guys clear all the custom saved views for each plane when using trackIR?