A dot as the direction indicator is made with second model, dual color is recommended with it. Or just make the make body will work as well too.
https://youtu.be/2GJlZI_cYy4 for demonstration.
Caution: DISABLE STEPPER MOTOR before apply force to the knob.
30 minutes print time in dual colors.
Caution: DISABLE STEPPER MOTOR before apply force to the knob
This will help filament insertion for Atom 2.5 EX a lot since there are PTFE hose enlarging the resistance.
It might cause stepper motor and/or control board deranged if apply force without disabling it, use with cautions.