Track IR have almost the same problem than RoF seating on behind the seat on wide but in much better, the views are too far back.. TRACK IR need to be reconfigured in our own naturalpoint software since it is not as good/axis smooth as 1946 modded but similar to BOB II.
I also find the head bob to be a bit too much... ! to wide movements.. it make you think that your head is "gigantic" ..
Having a head designed with correct dimensions will give you a better sensation that can move vibrate etc.. but not as wide mostly while having a thick suit and safety belt on