"I have exactly the same problem. OSD does not get the data from APM until the telemetry linked to computer or tablet. Sorry I can't help but you are not alone."

"Are you sure it does not disarm? I have done auto landing tests and when I turn my transmitter off the drone lands and disarms by itself. If you have your radio on be sure to have throttle set to zero."

"Have you done an auto tune yet?"

"Try AVID as a supplier of all types of small bearings. I have ordered from them before good service an wide range. Should have the size you are after."