2002 VW Passat Radio Knob

A friend was missing one of the knobs (base, treble, ect), the toughest part was making the half circle interaction.

Used PLA, build with a 0.2 mm nozzle, and added brim 5~10 mm offset for the entire object. Moving the nozzle away from the part as too allow proper cool down. You will need to play with shell thicknesses to get the right final dim. And I increased the overall size by 1.02 to make a perfect fit. Print slow, take your time.