Lower Filament Guide with Runout Sensor

This is a 100% remix of a great filament guide idea from Holspeed (https://www.thingiverse.com/thing:3052488) and includes an optional runout sensor mod. It fits the Ender 3 V2 but should also fit an Ender 3 and Ender 3 Pro.

Filament Guide BOM:
1 - Filament Guide Body (Lower Filament Guide, Arm)
1 - Filament Guide Wheel (Wheel, Bearing Fit, Outer Grooved, 7mm x 30mm)
2 - Wheel Bearing Spacer (Wheel, Bearing Fit, Spacer, 1mm)
1 - M3x20 screw
1 - M3 nut
1 - 608 bearing

Optional Runout Sensor BOM:
1 - Runout Sensor Body (Lower Filament Guide, Runout Sensor Add-on)
1 - Runout Sensor Cover (Lower Filament Guide, Runout Sensor Cover Add-on)
1 - 20mm PTFE tubing
1 - 3 pin end stop limit switch (Example: https://www.amazon.com/gp/product/B0921ZSL3Q/ref=ppx_yo_dt_b_asin_image_o09_s00?ie=UTF8&th=1)

Installation Instructions:
Steps 1-5 are for the optional runout sensor mod. Skip to step 6 if you just want the filament guide.

1. On either side of the Runout Sensor Body are