Barry, I bet the replacement drone you received was stress fractured. Probably in crash from the original owner. They never seem to just repair the drone you send in. It's always a replacement. I've gone through it twice with a P4 and a Mavic. Never got the original back. I think that's just the way it is. They probably get a huge shipment of drones for repair and send then back to China for repair. Cheaper labor.