Finally got my headtracking up and running on my FPV Avanti. Couldn't help but get a little wild with it out at Circle City Flyers. Got slow in a roll and bounced it, but flew away. You can see part of the nose gear door fly up on impact around 1:30. I conservatively brought it around to land and inspect afterwards.

DJI Air FPV,
Bad Ass Gimbal from Motion Sic/FPV Air Combat.
Freewing 80mm Avanti v3 from Motion RC.
Taranis FrSky Qx7
Painless360 DIY Headtracker