External Spoolholder for FF Dreamer

I could not find a design that I liked, so I knocked one up myself. I kept is as simple as I could.
For this thing to work, you need to also print some lid spacers: http://www.thingiverse.com/thing:667599
WARNING: If you are printing large objects and the spool is still full, the filament can jump off the spool and get entangled.