spool hub

I had problems for the mounting of my filament spool. The inner hole was not consistent over all manufactures. I made this spool hub so that I can mount any spool with an inner hole ranging from 30 to 60 mm. I have mounted them as a set on a m8 rod fastened with two m8 nut with washers between the nut and the printed hub. On top of these mounting arms :

www.thingiverse.com/thing:720603/#files.