Im having problems with my Phantom 2 Vision + camera, it dosnt stay horizontal while flying.
When the Phantom is facing North or South its horizontal, but East or west it tilts to the side.
I calibrate the compass on level ground every time i take out.
Here is a link to a video i shot doing a 360° spin

Can anyone help please?

does this happen every time you fly?  always north/south/east/west orientation?  or is the wind direction having something to do with it?

Also, re your compass calibration, level ground don't matter cos you're holding the machine to do the calibration anyway.

I did an IMU calibration and that seems to have solved the problem.

Thanks for your reply