This solution is compatible with Amazon's Tianse spools:

https://www.amazon.it/TIANSE-Arancione-filamento-precisione-dimensionale/dp/B06Y4JQD7X/ref=sr_1_6?s=industrial&ie=UTF8&qid=1540919022&sr=1-6&keywords=tianse+1.75

The drawers can be arranged as two, three or four per module.
In the archive you find the proper files for each configuration, if you mess up is no real biggie: the parts differs only in details and they will function just fine.
In the root folder you'll find a jig to drill the holes in the spool and a ring to stack each module on top of each other.

Update 21/6/2019

I've added two new drawer styles: one increases the storage density the other provides a places where to store screwdrivers, allen keys, etc ...

Update 1/1/2019

I've added a jig to prevent the spool from twisting and warping while drilling the holes.