Quad, APM2, 550mm, Avroto Motors, SimonK ESC, X mode.

1) I fly in simple mode, but my Yaw just moves around everywhere and then the quad looses orientation to fly correctly. From reading here it seems this may be magnetic interference from power distribution and a log calibration may be helpful.

It seems that I need Telemetry to do this. Is this true? I do not have it yet. What is the next best thing? I know I am missing something from the explanation of calibration.

Is it better to move the APM2 up higher away from the power distribution wires? Is there a way to reduce the interference?

2) Because I have flashed ESC's my Stab P is up to 8.5 for stable flight. But I have a wobble only between motors 1 & 2 even though it is in x mode. How can I get that wobble out.

Thanks in advance for any kind replies