OK, I got it working. After installing FaceTrackNoIR you need to install the plugin pack (download for which should be on the main download page). After that it pretty much just worked. Settings are:
Tracker Source: faceAPI
Game protocol: FreeTrack (disabling TrackIR)
You probably want to up the smoothing a little. I set Pitch and X to inverted.
It’s still a bit janky, and doesn’t work all the time (restarting the flight can fix it), but that’s where I’m at.