Although sub-trim is always recommended, I prefer to adjust a new setup with turn buckles (leaving both trim and sub-trim set to zero)... if I lose my center after a crash, maintenance/wear, etc... and I have to make a quick sub-trim adjustment during warmup before a race, then I'll make sure to go back at the end of my race day and set my sub trim back to zero and re-adjust my turn buckles again. So much easier to check the main screen and see everything zeroed out, never know if you accidentally bump a trim button and lose a setting that you might not realize right away until halfway through a race you discover that your car isn't tracking straight
