These stackable filing trays share quite some principles from the Compartment Storage Box. The assembly relies entirely on a glue and screw free press fit principle and – pretty obvious – the same material from closet back planes. Furthermore I added the same tappets with corresponding recess for stackability. A few kerfs help to bend the bottom a little.

I used a desktop cnc-machine by Stepcraft, but the design could be done with a laser as well.

Visit https://www.zenziwerken.de/en/ for more interesting designs. Consider a donation if you like the build.

Keep in mind that the stl was uploaded just for a three dimensional display here on Thingiverse.