Skull Knob for 6mm split shaft potentiometers.

Took Book's edited model of ncsandor's skull and adapted it to fit 6mm split shaft pots on electric guitars and basses.

It's obviously a bit larger than off the shelf knobs (a little taller and larger diameter), but someone might like it.

Remixed from:
http://printables.com/model/485646-skull
https://www.printables.com/model/67103-skull-for-fdm