DJI has been singularly unhelpful with my problem. When front OA sensors are on, Mavic top speed is 8mph. Turn them off, and full speed is attained. I have done enough testing to know it's not the wind, the sun or the Mavic settings. DJI support wants me to recalibrate the cameras and sensors. I have tried that numerous times and the process stalls at 85%. I have read enough threads to know this is a common problem with DJI assistant. So I turn now to the Mavic users who have lots of experience with the quad. DJI has sent me an RMA # but I really want to avoid that if at all possible.