I hope someone can help. I am not new to drones, but I just purchased a runner 250 pro. Out of the box it binded and flew great with GPS hold. I have a qr x350 pro and every now and then I do a compass calibration just to keep everything flying true. I tried doing a calibration on the runner pro and it will not complete the calibration process and now I have no gps hold and it does erratic things while flying. It will enter calibration mode, but the red lights on back will never advance past horizontal calibration. I have tried it in my back yard, out on the street, in my living room and it still will not work. anyone have any ideas???