Ender 3 Snap on Filament Guide

There are so many filament guides here, that it took a while before I found something that looked like it might work for me. I started out using another Thingverse Ender 3 extruder filament guide that I downloaded here, https://www.thingiverse.com/thing:3010366. It worked fine, but it basically just pushed on, without any particular alignment capabilities, and did not actually cover the Z axis rod if not aligned correctly. Even though my guide was completely redesigned from scratch, I did get some of my concepts from this existing design.

I wanted something that pushed and snapped into place with a repeatable and more precise alignment to the Z axis rod and the extruder itself. I also wanted more protection from the Z axis rod.

Instead of using the two screws on the Z axis threaded bushing to hold the filament guide down, as some designs have done, I made a snap fit that slides around the these two screws instead. No tools or extra parts to hold or align this extruder filam