I don't run that radio, mine is Futaba, but thats the way mine works. I take shell off so I can watch the wheels when setting the strg epa and run it down til I see it back off the strg stops and then run it back up until the travel just barely touches the stop. The repeat for teh other side. Then I run strg lock to lock a few times to test it out.
Nitro with throttle epa, I pull air cleaner off so I can see in the carb and set epa so the slide just clears the carb throat.