Side Spool Holder

My Monoprice filament spools are about 2mm wider than the short axis bars, which caused them to rub the uprights and not spin freely.

The I widened the distance between the uprights to 84mm, which allows me to mount 2 spools on the side of the printer.
I also made the axis bar one piece, to remove the 6mm overlap caused by using two short axis bars.
The uprights are slightly bowed at the hook end attaching to the printer, because the top cutout of my printer is slightly smaller, but I find the bowing helps keep the whole unit from shaking all over.

I ended up making the filament guide out of an axis bar, and the feed hole section was pulled from FunkyArt's filament guide. I noticed my filament was binding on the small hole, so I drilled out the feed hole and used small section of my filament tube to smooth the feed.