Spool holder using M8 rod and 608ZZ bearing v2

Filament spool holder for spool with hole diameter 20mm to 80mm
Based on xp7amrkr's http://www.thingiverse.com/thing:467008, adapted to fit 608ZZ bearing (22mm diameter, 7mm height, using M8 threaded rod)

Redrawn using OpenSCAD 2016.03.26

Credit to AndrewBCN for cutting sharp edges and reinforce legs (http://www.thingiverse.com/thing:586673)
Credit to lejoiedevivre for rounded legs (although the curves are too fancy) (http://www.thingiverse.com/thing:1521561)