The copter had a compass error a few weeks ago, and I've just put it back together. An arm needed replacing & the USB port on the exterior (body & PX4...couldn't believe it) is broken. I recalibrated everything & took it out today. It flies, but cannot stay level. It keeps altitude just fine, but wobbles & cannot stay level. What could be the cause, and how could I fix this?
I am using props that have never been in an accident. No camera is attached.
Any insight would be appreciated!