Six (2x3) of the normal trays fit nicely into a 2x3 Moppe tray.
Six of the small trays fit into a small 3,2,1 Moppe tray.
Six of the big trays into a middle 3,2,1 Moppe tray.
And they are nice to put Lego in while disassembling a techinc model
Optimized for 0.4 mm nozzle @0.32 layer
E3D Any, I use EDGE