Got a Hubsan X4 a couple of years ago and flew it a bit and then put in case for a year or so. Decided to get it out again, charged up the batteries and fired it up. No lift off the first time, noticed the blades were reversed on the motors. Made the switch, liftoff, but need calibration. Reset the controller and now one pair of motors are turning in the wrong direction for the orientation of the blades. I don't think that is correct. How did the motor rotation direction get reversed? It flew before I messed with the calibration of the controller so I know the blades are on correctly. I could fly it with all white blades but I want to figure this out and fly with both white and black blades. Thanks in advance for any help / suggestions.