Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4981103.

I used this filament guide for the ender 3 to make a guide without taking anything apart on the printer to install it : https://www.thingiverse.com/thing:3052488

You will need to print: 1 - bracket 1 - ring 2 - spacers

Plus you will need: 1 - 608 bearing (probably the most commonly available bearing, used for skateboard wheels and other things). 1 - M4 x 18mm or 6-32 x 3/4 bolt