Smaller steppers like a 20 mm from what I hear struggle at higher print speeds (100+ mm/s) from what I hear, and even the ~40 mm stepper I have on my i3 clone can click and lose a few steps every now and then at high speeds. If you have experience that says otherwise I would happily admit I'm wrong and jump to a simpler, non geared version. Do you have any experiences with 20 mm nema 17s or similar for extruders printing at upwards of 100 mm/s? I know they can keep up at 40-60 mm/s but thats not what I'm going for.