This is a clean, functional adapter designed to bring the power of the Gridfinity Clickfinity ecosystem to your Festool Systainer³ S 76 (the mini variant with separators).

These baseplates provide a 3x6 grid layout, allowing you to secure your bins and tools. Notice that 2 of the spots are in the way of the side rails. A cover provides a tight fit with 7U+lid (~53.4 mm) Gridfinity bins.

Features

• Precision Fit: Specifically tailored for the internal dimensions and corner radii of the Festool Systainer³ S 76.
• Split Design: Divided into two interlocking sections for easy printing on standard build plates.
• Secure Layout: Standard 42mm Gridfinity spacing to keep your drill bits, fasteners, or electronics components from sliding around during transport.
• Efficient Height: Low-profile design to maximise the remaining vertical space in the "Mini" Systainer. Fit for 7U+lid (~53.4 mm) Gridfinity bins.

Clickfinity

• Save on magnets and depth with this original design from jrymk. I designed it from scratch as I was not able to find CAD files. 
• Print with PETG or PCTG or any filament with enough plasticity so that the springs are not breaking. PLA will likely break.
• Use blockers to avoid the plates being pulled up with the boxes. Push the 4 blockers in the rails of the long side using the original Festool separators. The narrow part should be in contact with the grid plates.
• To remove the blockers, use a spoon and slide it under the blocker from the side. Use it as a lever to pull it out.

Top cover

I provided a cover and the pins to block the voids of the top the Systainer.