Thanks Alex, it works flawlessly with the flight game DCS (eye tracking and headtracking).
Also FYI It works well with another flight game Aerofly 2 which has built in tobii eye tracking (settings>Controls>tobii) and is not reliant on the tobii infinite extention.
Finally, do not dismiss the people with larger TV’s (mine is a 65″ Samsung Smart TV) as long as you sit close enough it works splendidly both left to right/left, up/down.