For uncompress file, use: 7-zip

I have created two project. (see my images on the Drakon gallery: "http://boardgamegeek.com/image/890893/drakon-3rd-edition")
*) Box for plastic units and token (Drakon_Miniature);
*) Box for chambers (Drakon_Tessere)

Inside of archive:
you find two type of file:
*) *.FCStd is for FreeCAD!!
*) *.png if you don't want use FreeCAD

Important:
***** Check measurements before cutting. ********
All dimensions are in millimeters.

Tools:
Foamcore (5mm sheet)