I'm not sure. I was under the impression of, if it works with the GCS its needs both input and a mixer. Just like the 4 control channels ele,ail,thr, rud. All three of my quads have both input and mixer for the flight mode and arm switches. I run an idle up as well but that's only set up as a mix on the throttle channel. And has nothing to do with the GCS side of things. I'm really not sure to be honest. The input is the "what" and the mixer is the "how" if that make sense.