Universal Filament Spool Assembly

I designed a universal filament spool roller that would accommodate all sizes of spools, (1 kg ...2 kg) regardless of manufacturer.
I wad inspired by dintid's excellent design, but his won't work with my printer set up
http://www.thingiverse.com/thing:1775818
This is designed to use on all sizes of aluminum extrusions. Try to support it like I have in the photos, but I think it will work in many different configurations
I was surprised how well it actually worked, even on heavier 2 kg rolls.
Easy to change spools.
I have included files for a single color model and for a dual extrusion model. ( I went a little crazy testing the dual extruder I designed for my printer ).