I've made a portable organizer system (after a friend request) for the Dewalt tstack v case.
Features slots and walls so you can make spaces based on your needs.
The ring fits snyggly inside each box and doesn't come of easily.
The walls may come off at sometimes but sit quite nice nevertheless.
-Update: Added more function with Version2 parts. Now you can connect the wall in a cross like form.
olso posted a cad file so you can tamper with the desing as you see fit
Hope you enjoy
DasFilament PETG PETG
Its better to use brims because corners and slot extrudes tent to unstuck from print bed.