I really like the knife tray for 91mm Victorinox knives, so I remixed it for the 111mm Victorinox knives I have in my collection (file included here) . Then I found the modular holder for Altoids tins and it gave me the idea to make one for the knife trays. All it too was some scaling and I added a couple of overhang block at the back to that the trays sit nice, but I still have space out the top of each tray. My Swiss Champs with a pocket clip won't fit in the tray laying flat so I have to put them on their sides. This design allows for that.

They will print fine with no supports. I used gel based superglue to fill the gaps when gluing it together, but I feel like hot glue would have been plenty strong enough..

There are countersunk holes in the back of each layer that will take #8 wood screws, which is over-kill for this amount of weight... Or is it?