This is a remix of the 90 degree 2020 Filament Guide by Evan VW. I made the loop a little thicker and added a small hump to allow for the Adimlab 2020 plastic trim that is on the extrusion.
Update: Increased the scale by 2% as Evan VW suggested. Made it 18 mm wide and added a slot in case you forget to loop the filament into it before printing. Also increased the size of the trim hump. Works great!