Ender 3 Filament runout sensor super duper remix

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5021688.

Took this filament sensor mount and remixed it for my needs and combined many of the other mods.

<ul> <li>Increased clearance between 608 bearing and switch so it doesn't get triggered when no filament is entered</li> <li>Added hole for zip tie from [thing 4813860](https://www.thingiverse.com/thing:4813860)</li> <li>Added clip from [thing 3449930](https://www.thingiverse.com/thing:3449930)</li> <li>Moved filament channel closer to the frame so it enters the extruder straighter</li> <li>Made the switch hole a bit tighter of a fit</li> <li>Made the key a tighter fit</li> <li>Made the holder for the bearing a tighter fit (increased OD slightly to prevent wobble)</li> </ul>

Got it perfect based on my Ender 3 (regular) and the switches I used.

The roller switches I used were this: https://www.ebay.com/itm/283228402439 (6 pc TEMCo Micro Limit Switch Roller Arm Subminiature SPDT Snap Action LOT)

The bearing is a regular 608-2RS skateboard bearing.