i3 Mini Spool Holder Mod (Wanhao / Monoprice)

I have some crappy Ebay Special PLA that had a weird spool that didn't slide very well on the stock spool holder, it kept geting bound up.
I searched and couldn't find something that would just work so i took inspiration from a few different designs and made this.

Each bearing will require 5x 4.5mm BBs.
The bearings do fit very snugly on the shaft, they won't ever come back off.
I zip tied down the outer support because it kept slipping and hanging up.
These can be adjusted for smaller wi