I have a Y6 copter with a new Pixhawk mini. Motor 5 keeps stopping - the pattern suggests a loose connection. I have swapped out the motor, ESC and reflashed with version 5 firmware. The problem persists. I am not confident that I will find the problem and of course there will be a trust issue. Is it possible to remap the motor 5 output to the motor 7 output which is unused?