Lint Roller Spool Holder

I recently bought a spool of Hatchbox filament, but the hole is too small to fit on the Printrbot Simple Metal spool rack. I like the idea of the horizontal spool holders, but they use up a lot of plastic. So I decided to mix that with my original spool holder, which was just a lint roller clamped to the aluminum handle.
I have also been playing around with OpenSCAD recently and decided this would make a good weekend project.
Et voila, one filament spool holder.

To keep the design simple,