It seems there are no 3x gimbal available to mount a GoPro or other camera on a sailplane! There are numerous such gimbal units available for various drones but none seem to be standalone and instead must be attached to a drone for control, power and communication. Haven't found one that operates independent from drone and provides control and viewing on iPhone or other display. Might have to affix the complete drone, with gimbal and camera, to the sailplane! Hmmmm?!