a quick experiment i did yesterday with opentrack
i programmed the input for oculus, and the output as mouse, i inverted the yaw and pitch axes and adjusted the sensitivity. the idea is a mouse that pulls the cursor in the opposite direction to cancel the dcs one. when entering dcs, already in the cockpit i activate it with the shortcut programmed in opentrack and when moving my head the cursor starts to move for a brief moment, until it stops, shaking. it works! but dcs adjusts a dead zone or reduces the sensitivity of the oculus tracking when it detects that the movement is minimal to increase the precision of the cursor. outside of dcs, on the desktop, without inverting the axes, the cursor follows our movements perfectly centered. DCS does something...
The next step would be to configure a phone with Freepie to act as an external OpenTrack sensor that DCS can't see, and stick it to my glasses. But... the DCS cursor is not linear, it will be impossible to adjust OpenTrack to override it. I don't know, maybe one day when I'm really bored I'll try again.
Disappointing