This clip was edited in iMovie.  I'm working on how to lay these out as I have a trip to Exuma coming up and would like to get great footage.  As you can see in many of the clips I was having a hard time getting the AC to stay stable and follow a straight path even with low wind.  I have since done an IMU update and hope this will help with the stabilization of the Spark.  Editing tips are appreciated!

Nice video ...

Nice video.
I think I recognize some stuttery motion due to the iMovie issue with Spark footage (framerate is slightly off).
Do you also see this while watching your original footage?

If you don't have much movement (cars, waves, ...) in your clips, you could fly faster with the spark and then slow the clip down in iMovie. That could help getting more smoothness.

Great video! And I like the seawater the most, thanks for sharing with us.