Mini Loose Filament Spool (Full Printable !)

Hello people,

here is my solution of a spool for loose filament. I have a few samples of filament (20 m per color). so I wanted this to coil and best 3 next to one another.

This spool is fully printable and without screws. And can optionally be used with 3 or 4 arms

Longer arms here:
http://www.thingiverse.com/make:72957