Just got my replacement P2V+ due to the SD not being seen by the software. Upon startup, the right rear motor runs hotter than the rest and when it is not running, the motor does not spin as easily as the other three. Also, I can get green lights when I do the first part of the compass calibration but get yellow/red on doing the vertical part. Any ideas? I don't want to have to send the second one back and go through the whole routine again. Thanks in advance.