Needed something small to test a parametric rugged box I have made, so here is a little one for a swiss army camping knife.

This is based on a Spartan model, other thin 91mm models might work too.

Designed around some common m3 hardware, you will need:
4 x 25mm
2 x 30mm

Follow the images for screw orientation, the inner holes are designed for the screw to self tap into.