Interesting but I believe this is a different scenario. The problem here is to avoid the phone rotating around the axis of the lens. The air flow from the circu

Interesting but I believe this is a different scenario. The problem here is to avoid the phone rotating around the axis of the lens. The air flow from the circular motion could be used to stabilise it when there is fin at the back of the case. In addition the axis needs to point towards the center of the circular motion. Fixing it with a string at each corner is probably enough for this.