Strict vs very strict compass calibration

ArduCopter
1

I am able to calibrate my compass in strict mode but not very strict. I assume very strict will give you something better or the drone will probably handle or act better.

I would like to know what could possibly cause very strict to fail. Am I going too fast? Does electrical noise influence it? Does anyone get very strict to work and how?

2

Good question. I just use normal cal but I also know where north and south is and rotate the craft to check if i am close i am happy.

3

Does it hold its position well and everything is perfect?

4

Yes I done some very tight auto missions that have been fine.