Hughie, You nailed it on the head, you must keep the compass totally free of any other wires, antenna's, whatever. So I think, now, that the whole problem with this Phantom 2 is that his technician does not have any experience and it is completely wrong in it's set up, no wander it was having problems, even minor ones. Maybe now, if they can see the photo's I posted, how it should be set up.
Bachir, Like I said before, send me a plane ticket and will have you flying like a pro in no time. (Just Joking) That would mean I would have to get my passport renewed and then be put on the FBI's travel list the minute I boarded the plane. I remember the old days when I flew all over the world with no "Worries" about anything. Nobody thought twice about a Golf Course Construction Superintendent showing up or going to some Far East, Middle East or European Country.