Parametric Super Useful LCD (Potentiometer) Knob

See it in action: https://gfycat.com/pointedadmiredenglishsetter

This is the ultimate LCD knob!  It's got an ergonomic notch for fast one-finger rotation, nozzle storage, hex wrench storage, a magnet for quick swapping of hex wrenches, and it's parametric so you can change how many nozzles/wrenches it holds, make your own labels, or whatever you like!

There's prerendered .STL files for:

• A knob with storage for four E3D V6 nozzles and the standard 2.5mm, 2mm, and 1.5mm hex wrenches that are included with every Prusa printer along with the .scad that generated it.
• A knob with storage for seven E3D V6 nozzles and the .scad file that generated it.

There's also prerendered .STL files if you want to do a multi-material print of the labels (like the ones in my picture which have white numbers).