We are big fans of the simplicity and results we get from our Dremel Idea Builder 3D printers.  They are the closest thing to a 3D print appliance that just works.  Our only gripe is the “razor blades” and “cartridges” model that Dremel uses with their filament so we’ve given ourselves options by using holders that support larger 1 kg filament spools.  We also like the Makerbot filament sampler which comes with smaller spool sizes.  Here is an in-printer spool holder for those samplers.

We’ve posted this model to Thingiverse for remixing.  Print takes about 50 minutes on standard settings.

http://www.thingiverse.com/thing:2218733