Since not everyone buys a Makerbot Replicator which has nice spool holders, we needed to create a spool holder so that we could leave my Printrbot Jr alone to do its thing.
A couple 3D printed parts and 3 Bic pens later, we had our solution! Hope you get some good use out of it!
(Not using your spool support anymore? Use the base to be patriotic and make a little Bic pen flag pole http://www.thingiverse.com/thing:97841 :)