I just purchased a used QAV 540 with everything ready to go except no tx or rx. I also purchased a Taranis X9D plus with the X8R receiver and now I am lost!!!!! The QAV has NAZA V2 and I have downloaded naza assistant as well as open tx. I also was able to download a model some one put online that they said was for a taranis with naza for their QAV 500, I put the model on my tx and besides the gimble H4 3D moving when I flip some switches nothing else seems to work. Did I say I was lost???????? PLEASE HELP