Reusable Filament Spool

A simple print spool that uses two M3 inserts and bolts to keep it together.  I used brass inserts because it allowed for less filament to be used for the two parts.  You could probably use some other type of screws if you dont have inserts but I would recommend spending a few dollars for a box of brass inserts. I have only tested this with spool-less Inland filament but will work with any filament that would slide over a 91 mm cylinder. 

This is designed to use a minimal amount of filament but is still very sturdy.