I've had no luck with the downgraded firmware 1.5.7. Still can not get any range, and loss of signal problem within 300 feet. I'm going to go back to the latest firmware for the P3S. I have 2.8.3 on the RC, but where do I get the 1.6.8 for the Drone? I did an update tonight, but the 1.5.7 did not change.