Ditto on what Chuck said, I also have a kill switch so trim movement is not needed.
When I'm setting up my throttle linkage I zero all imputs on the radio and set the
throttle stick in the center and checking that the servo is centered.. I now check
travel against the hole/s on the carb. horn<??> and make what ever adjustments
that are needed... I usually input 100% on the kill switch in the radio set up.. I then
close the throttle stick and push and hold my kill switch then shut off the power on
the radio and plane. I then close the carb. completely and hookup the linkage, and
recheck and adjust as needed....
I started all my adjustments the same way on my non-kill switch radio radio.....