I am having huge problems with magnetic interference when I fly my quad. I had recalibrated the compass dozens of times, replaced the gps/compass, raised the gps as high as the wire will allow (10cm). I even moved the battery and power wires under the frame. But you can see in the logs where the magnetic field spikes which causes significant yaw drift and then soon violent toilet bowling.
DJI Flame Wheel 550
External GPS on mast
Ardcopter V3.1.5 ( i even tried the latest beta release of 3.2)
8 45 blades
30C 2800 LiPos
You can see the toilet bowl effect and the magnetic field levels in the logs (attached). Please, any help would be appreciated