I have been flying my P3S now for about two years and have wanting to fly an area that was an old WWll seaplane base with a lot of concrete and rebarr on the ground. ,Because of all of the rebarr, I naturally wouldn't be able to calibrate the copter. Been wondering if I had the new Mavic 2 either Zoom or Pro, would it still be a problem? I could calibrate away from the area first and then possibly fly afterwards where I want to launch from such as the rebarr area. Has anyone had experience with this type of situation? I know that the calibration is for the compass but I also wondered if the Lightbridge or Occusink(sp.) would eliminate the problem that I am experiencing.