Is it possible to download FW for a P4 into a P4P? A friend of mine did a firmware update on his P4 and he lost all his distance on flight. For some reason he thought he had a P4P, and I'm just wondering if he could have downloaded the wrong FW into his P4. Before he did the FW upgrade his distance during flight was good, now he can't get past 1500' without signal loss.