Yesterday I was flying but there are some problem compass not completely work so I decide i want to put on other side like on this photo. But problem is I wann be start it always on stabilize mode and after loiter or other. Stabilize mode is ok now I landed and try on loiter mode as I need but after take off on like 30 to 40cm is rounded like 2 and 2.5 times and after stable in lioter mode and his forgetting head direction like a super simple mode what can I do ?
I think the compass and gps module putt together so make this mistake…
And sorry by mistake video is deleted on my phone 
Start by mounting that GPS unit up higher, especially if it has a compass in it.
And secure the GPS wiring and battery wiring so it doesnt vibrate and move around.
Then redo the compass calibration.
Ok sir do it first 