I have done all the usual calibrations and the camera is permenantly angled stightly left.  My horizons are always slanted down hill right to left.  This can be fixed in Premier, but what a pain.  it has been this way since I opened the box a couple months ago.  No crashes. Does anyone have a fix?

Hello CO34, Try the manual calibration under gimbal settings. This should allow you to correct it your self. Good luck

As a shortcut to above mentioned adjustment, the same can also be done by holding C2 button operated, and while keeping it held operated, using the right hand wheel on the RC adjust tilt left or right. It's easier than going through te menus, and can be adjusted when in flight.

It's often been suggested that a good IMU and Gimbal calibrations can produce a level horizon. Many times I'm filming I'm not too aware of things because of hilly countryside.

Could you please clarify which Phantom model you have? If convenient, please provide some photos of this issue.

Try to calibrate the gimbal

What firmware version on Phantom 4 and RC (Remote Control) are you running?