For a few years I've been using a continuous servo, triggered every :10, with a Brooxes gear set. It does a complete rotation every 9 minutes. A couple times lately I've checked it before launch, only to have no movement in the air. I suspect that the wind is overpowering the servo on some flights. Last session I ended up with 233 almost identical shots of Smith Rock State Park here in central Oregon. Thanks to a 2 axis gimbal, I was able to stitch two consecutive shots together for this panoramic.