I bought a vxl-3s and velineon 3500 motor as a "pull" from a new system; I'd like to replace my own radio (a flySky gt3b) but can't get into programming mode (where you squeeze the trigger to full throttle/reverse) because when I let go of the button, it goes into one of the preset modes (race mode, sport mode, training mode)

there's a way of restoring the stock transmitter/receiver, but what about the ESC?

Is there any way of starting again?