Found a p3s to replace one I lost, couple of questions, had flight data reviewed ,said mother board crashed causing fly off,(never found stuck in heavy forest tree tops) questions 1 I have two remotes now ,how do I know old remote isn't fried,2 what do u have to do to pair old remote with new bird,( I want to modify antena mod slso). 3 has anyone added some form of GPS tracking device to drone,( I feel if I had on old one I could have found ),thanks I'm refreshing my memory looking at tutorials getting ready to fly, got whole package cheap, guy flew couple of times wasn't into it