i use pan all the time now, used snap to get used to it on first day. I had a heck of a time keeping my head steady but after i set the deadband on "agressive" it gave me a nice smooth forward view that i can gun with very well and not have alot of jumping around. as you move to the 6 view the response is much quicker so you dont have to move so much. I think the key to not haveing too much jumping around on the screen is to move your body like wotan said, for the views past 30 degrees so you dont tweak your head, and for fine movements you can use your head, gunnery ectra. all in all i have found i can take on alot more cons, at least keep track of them in a large dogfight, i dont see how turning snap on in this situation would help, tho i do look like im getting shocked by electricity when im in a dogfight:) it makes it that more fun and that more realistic.
i deleted my snap views form hat and have forward hat as pan mode, left is center, and back is the strafe head position mode. as far as using the center button, i only use this if i move my position in my seat or freak out and lose my orientaion, aka body english as bullets ping me

tir doesnt really lose calibraiton from what i have seen, with the native support at lest.
its kinda cool i actually used to live in corvallis oregon where track ir is made, i think i saw an add for beta testers in the newspaper once, shoulda jumped on that lol.
all in all i really stand behind track ir and have become a wondering sailsman for it. i think its the best interface we have so far since the advent of the joystick for sim games.
ok ive done my tir shpeel. thanks again for getting it going in ah2 htc!