I very recently purchased a M2P and being a proud new owner I mentioned to a friend. He said I wish I had know, I have a P4 that I'd have let you have cheap that has only been in the air 4 times. So now I have two DJI drones. My issue is with the P4. When flying at a steady altitude in a straight line the rpm's of the motors surge continuously. It also is only flying about 18 to 20 mph at full throttle with a fully charged battery in "P" mode. I haven't updated the firmware yet and I'm hoping that will correct the issue. Has anyone here experienced these same symptoms?