Yet Another D20 Dice - Easier FDM Printing

A basic D20 dice. Nothing super special. I did reference the proper design of a D20 dice, so the numbers are not randomly assigned.

I did a re-design to remove the ridges and inset the numbers, I find this prints nicer on FDM machines this way.

Standard tree supports with Cura work well. I place the 20 face down.