About this 3D model
Inspired by all the doorstops! Here's another! This one measures 3.5" in diameter and has a 1.5" slot in the base to accommodate the door. Also, the bottom is angled for a snug fit. (Note: I did a lousy job sanding this. I'll upload a better picture once I get this done.) For CNC routing, measure the gap between your door and the floor, then raise the Z axis accordingly. Allow 1/8" for the model. Ideas for printing: 1. Make it out of glow in the dark plastic. 2. Make it hollow and add a battery pack and LED light.