I spotted this on the tool launch page for the DWST08017 Toughsystem to Tstak adapter - looks like it may play with the non Tstak organisers too : r/Dewalt

New Dewalt ToughSystem Adapter for Tstak and More!

DEWALT® TOUGHSYSTEM® 2.0 Adaptor

DEWALT TOUGHSYSTEM 2.0 Tool Storage Adaptor, Connecting DEWALT TOUGHSYSTEM 2.0 products to DEWALT TSTAK (DWST08017) : : Tools & Home Improvement

DEWALT® TOUGHSYSTEM® 2.0 Adaptor

Dewalt TSTAK to TOUGHSYSTEM Adaptor!

New TSTAK Job Chest : r/Dewalt, tstak

DeWALT TOUGHSYSTEM 2.0 Adaptor (DWST08017-1)

Expand your storage capabilities with the TOUGHSYSTEM 2.0 Adapter. This multi-system adaptor enables cross-platform compatibility with DEWALT TSTAK,

DEWALT TOUGHSYSTEM 2.0 Adaptor

DEWALT® TOUGHSYSTEM® 2.0 Adaptor

DEWALT® TOUGHSYSTEM® 2.0 Adaptor

DEWALT TOUGHSYSTEM 2.0 Tool Storage Adaptor, Connecting DEWALT TOUGHSYSTEM 2.0 products to DEWALT TSTAK (DWST08017) : Tools & Home Improvement

Connect DEWALT TOUGHSYSTEM 2.0 Products to TSTAK Modules, Pro Organizers, And TOUGHCASE Sets

New TSTAK Job Chest : r/Dewalt, tstak

Connect Tough System, Tstak, Pro Containers, and tough cases! Dewalt DWST08017

DEWALT TSTAK Stackable 7-Compartment 13 in. Small Parts and Tool Storage Organizer, Foam Insert and 3/8 in. Impact Socket Set DWST17808738801 - The Home Depot