Core isn't available yet in the U.S.
As for Spectrum, which is what he was asking about... If you fly with one of the new Powersafe receivers, Telemetry for a Kingtech turbine won't work without a workaround. As I understand it in simple terms, it seems the power to the telemetry isn't powered up until after the Binding process occurs and then power is shifted over to servos and telemetry. That is an issue for me since I like to look at my turbine's parameters when starting up. Like I said, you can do a Y harness and add a back up battery and switch to the telemetry unit so it'll have power upon receiver turn on, but who wants to do a "work around" when it's not necessary. This only occurs with Kingtech with their new telemetry unit, not the G1 turbines and Xicoy ECU. I fly the DX 20 and like it a lot but I'm always on the look out for something new.