Hi all i bought new landing legs with compass and shell top for my p3a installed them fine but the new compass won't calibrate i plugged in the old compass no problems didnt even have to calibrate tried new one again but same thing had calibrate so i tried i keep getting message on dji app saying magnetic field interference so i contacted the place where i bought the shell and landing gear with compass they appoligised and sent new landing gear with compass but i still cant calibrate new compass same message on app magnetic field interference i installed new firmware update 1.9 still no joy i downgraded firmware to 1.8 and still no joy however the old compass works fine i cant use old compass as the wires are about to break any ideas please