Belmont Wharf sunset

I did something I hadn't done in ages and that was take myself and the hounds out to catch a sunset.   We were at Swansea for the official sunset but I preferred this image at Belmont on the way home in the Blue zone.

Buzz got a test but his gimble is off.   Do any of you drone flyers know how to reset the gimble to get a level horizon.  I did recalibrate the vision the other day where you set it up on the PC or Imac and do all those blue squares in the dots thing and I wonder whether i need to do that again.  Any help greatly appreciated.