Just Another Simple Spool Holder

This is just another low cost Spool Holder, this design fits standard 56mm spools down to 52mm, it requires 2 x 608ZZ ball bearings. The idea is to have a bunch of spools on a long threaded rod (https://www.thingiverse.com/thing:2512609).
The ball bearing hole was initially made tight so you need to use a pair of plier to pop it in (for the first version). It comes with a little spacer. I printed mine using PLA 1.75mm, 10% infill and a bit slower speed (50mm/s).

Update 1: Separated objects to different files, plus adding a spacer with gap to make removal easier.

Update 2: Removed the spacers which were too small, replaced with rod covers

Update 3: Redesigned the Spool Holder, this one is easier to put the ball bearings in and is more stable.

Update 4: Added a slightly larger version (59mm diameter) for larger spools.

Update 5: Added a 65mm version. By the way, there is a reason why there are 4 holes in the holder. A few cable ties will secure them in the spool, it