Transformers Extruder Knob

Both Autobot and Decepticon Extruder Knobs designed for the Ender 3. Should fit other printers with extruder shafts of 5mm. I haven't tested the Decepticon knob but designed it similarly to the Autobot one.

Autobot logo: https://grabcad.com/library/autobot-logo-1

Note: I originally uploaded the CAD model for the Decepticon Extruder Knob but I have replaced it with the right STL file.