Customizable spool stand

Hi,
I choose to make one of this spool "stand" cause it's easy to make, using ball-bearings, and it offers a constant tension on filamment!
The probleme was that spools are all differents, and even ball-bearings exist in different sizes.
Here you will be able to customize the spool stand with your ball-bearings diameter and width, and of course with your spool diameter and width.
In order to not create one stand by spool, i design an adjustable jigsaw part.

Here the provided STL files are