Made these knobs for my stereo on my 1999 Chevrolet Suburban 2500. Printing the bigger knobs upside down will give you a better result for the bottom insert. Maybe I just have to tweak some settings on Bambu studio but i'm still new at this. I used PETG filament. Enjoy. 

NOTE -

THIS WAS INTENDED TO BE USED WITH YOUR METAL INSERTS FROM YOUR OLD KNOBS. IM SORRY IF YOU DON'T HAVE YOUR OLD KNOBS, YOU WILL HAVE TO RESIZE THESE TO FIT WITHOUT METAL INSERTS.