I didn't like how the typical spool cradle can move around, and my spool would often jump off the bearing. This is a simple print, and uses a standard skateboard bearing. Press fit the bearings into the roller with your bare hands, and just snap the rollers into the side piece. The side piece is remixed and made taller so that the roller can clear. You may need to shrink the width of the roller to fit in the typical Rubbermaid dry box; mine fits alright at 100%, but it doesn't sit all the way down on the bottom of the container.