Through Shelf Filament guide

just a simple plug/guide for the filament if you want to have your spool above the printer and feed down through a shelf above. 5/8ths and 1/2 inch diameter and set up for 3/4" shelf material.. but shouldn't have an issue with anything 1/2-5/4 (1 1/4") shelf thickness

there is a slight taper both top and bottom in the center so edge drag should be eliminated for the most part.