I've not been totally happy with the stationary stability of my P3P since I bought it, convinced that there are other phantoms out there that appear rock solid to mine. When hovering within 3m of the ground it didn't stay completely still, sometimes losing altitude slowly. I noticed the altitude on the go app yesterday was registering 3.1m when it was more like 1.1m so that was a bit weird. Having never calibrated the controls on the RC yesterday however it now appears a lot more stable. One thing that hasn't improved however is that at altitude when I'm taking shots and I yaw a little to capture the next shot for a panorama, the quad appears to keep yawing slightly on its own when I release the controls. Even if I knock the stick slightly in the opposite direction to stop it, the yawing starts again very slightly. I've left it alone for a few seconds and it continues to rotate counter clockwise (always this direction if I remember correctly). I can pretty much stop it if I apply a minute amount of yaw in the opposite direction but it doesn't seem to hold completely sill if I let go. This is at a typical altitude of 100m or more. If I hover near grouse level I can't see it rotating on its own, it behaves well. The only thing I an think of is the wind higher up but the weather forecast yesterday said it was only around 10mph - could this be the problem?