eSun is sometimes under around 1.72 and I have some Nylon that is 1.68 but never as think as what you have. Yes you should always set the filament size to the average, I leave mine set to 1.73 with Esun . The Maker Gear ABS I buy is dead on 1.75 but that stuff is made in OH by Americans, so you pay more but it is worth it for the higher degree of accuracy.