I thought I would post this just in case someone has this problem with the 6DOF movements.
Symptom: G2 head rotation works fine but when moving head fore & aft or side to side the whole cockpit moves with your head instead of your head moving in the cockpit, this really affects your dog fighting and gives you a weird sensation.
The Fix: open Windows Mixed Reality program (the VR program used by the G2) do not open the game, next click on set boundaries it will give you two choices (standing or sitting) chose sitting, it will have you hold the headset facing your computer screen then click center, at this point you have recalibrated the 6DOF settings. When this is completed then start up the game as normal and magically your 6DOF movements will be working again.
Good Luck
Propnut