Potential Magnetometer Issues While Flying From Rooftop

Hi Everyone,

I’ve been performing some flights off a rooftop for a few months now without any issues. I recently moved to a different building and started getting odd flight behavior (bad heading, copter drifting slowly in Loiter Mode, etc). The easy solution is to fly off the ground and not the rooftop, but what I’m working on requires operating from rooftops of industrial buildings (not houses). I was looking through the parameters list and came across the parameter EK2_MAG_CAL and was wondering if anyone has adjusted this from the default value of 3. I want to try switching this to 2 but wanted some input before risking a crash.

Thanks in advance,