Low profile spool holder for prusa

Yet another spool holder for Prusa printers. 
Idea is to make it simple and put the spool low behind the frame to put the center of gravity as low as possible without compromising stability.
It's designed to fit a std. 20cm spool diameter or less as well a fit various spool width … and incorporate the 20cm spool diameter into the design - just for cosmetic reasons.
Beyond simplicity, I've also tried to make a design that can be printet without any supports.
It uses 4 standard 608 bearings that are easily available.
Although stealing ideas from other designs, it's all entirely made by myself with purpose of leaning to model Fusion 360. Now done, I've might as well share it ;)