Kinda makes you wonder, don't it??? Perhaps setting up a control rod system is now a lost art?? I do find using my radio to do my set up and trim easier but after it is set I do it again the old fashion way, I twist the clevises then zero my radio trims. I do it all manually before the plane ever leaves my shop but after flight trim I do it again. Guess my age is showing again? Or is it still knowledge??