A simple curved spool coaster I designed for my printrbot.Designed for a 10cm radius spool, for a different radius spool, edit parts.scad with your measurements.Print 2 identical sides and use a couple nuts and bolts to hold some roller bearings in place.For best results, change the parameters in the openscad files to change the size, rerender and export. The spool is expected to rest a certain distance off of the surface, so scaling might cause it to clip the table.