Originally Posted by Daryoon
Thanks for that helpful 1st post @FrugalisFlyer. Welcome to the board.
It's possible one of the motor is going bad, drawing too much current for the RX to properly drive the servos.
Of the two motors, I would suspect the tail first. Try throttling up and pressing the rudder full LEFT. This should prevent the tail motor from running. Move the AIL/EVE around and see if the servo is still glitchy. If it is, then perhaps the main motor is the problem. Proceed to the next part for further testing...
Part2: Checking to see if Main Motor is the culprit
If you have an extra motor, you can try swapping out the motor. Or you can try to desolder the motor wire entirely. Then resume testing by throttling up and moving the servo around. See if the glitch goes away.
I have motors coming also in the pack of spares I bought, just a thought but flight times are not affected at all....Off to check the tail motor now