Took this filament sensor mount and remixed it for my needs and combined many of the other mods.
Increased clearance between 608 bearing and switch so it doesn't get triggered when no filament is entered Added hole for zip tie from https://www.thingiverse.com/thing:4813860 Added clip from https://www.thingiverse.com/thing:3449930 Moved filament channel closer to the frame so it enters the extruder straighter Made the switch hole a bit tighter of a fit Made the key a tighter fit Made the holder for the bearing a tighter fit (increased OD slightly to prevent wobble)
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 bearing.
Remixed from https://www.thingiverse.com/thing:3357097