I made this part in solidworks but you can make it in any CAD software.
I'm not doing teeth in this tutorial.
Step 1: Sketching
You can do a sketch that looks like mine or you can do your own.
Basically you want to make a sketch that looks like half of benders head. You don't have to make it look exactly like mine, just make it to your liking.
**YOU DO NOT WANT TO INCLUDE THE ANTENNA THAT WILL MESS UP THE PRINT**