When I pull the Stick back and observe the Carb. The Carb closes completely with the stick all the way back.

I have set the Travel limit to prevent over travel in both directions.

The radio acts like when you pull the stick all the way back that it is a cutoff function. Up 2 clicks and the trim works and you can adjust the idle..... pull it back those 2 clicks and it moves exactly the same as if you hit the Cutoff switch (Pulls the Carb all the way closed).