Stand-alone low resistance filament holder

I wanted a low-resistance filament holder for my Printrbot simple metal that could take a 2KG roll. None of the holders I could find were large enough for this and many of them position the filament on the printer itself but I wanted it desk-standing to reduce vibration and not put additional load on the Z axis.

This is easily printable and only requires 2x 608 bearings (per spool) to make. In addition it is easy to change filament, simply lift out spool and drop in a new one.