Hello, I am wanting to build a QAV250 per FLIGHT CLUB instructions ( http://fpv-flightclub.com/how-to-build-qav250/ ) , but I want to use my Spektrum DX7 transmitter, not the "Taranis X9D Plus", too! I do not want to use the "FrSky D4R-II" receiver. So what Spektrum receiver would work with this build? I am sure I am not the only one with a Spektrum Transmitter flying this FPV QAV250. Thank you for your help. Thank you for your response and time.