you can change the face plate of the knob easily there is a f3d template in the files
i use a 3.8x40mm screw for screwing to knob and 1.9x6mm screw for the plate
the screw in the face plate should be use with a thread screw
I haven't tested yet (printer broken lol) so try at your own risk, it will be better to download the f3d files and modify the screw to your needs
The author hasn't provided the model origin yet.