Filament Spool roller

Designed this to work with parts available at my hardware store. It uses patio door rollers; these work great as they are concave and prevent the spool from moving side to side.

https://www.lowes.com/pd/Prime-Line-2-Pack-1-1-4-in-Aluminum-Steel-Ball-Bearing-Rollers-with-Built-in-Axles/3042799