Fuzz enclosure

I have made this enclosure to house a FuzzF type circuit with a true bypass switch (3PDT).
The one I printed has had a layer of Epoxy resin over it, this has helped to stiffen up the enclosure. It has a lip and groove on the lid and base with a hole in the centre of the lid for an M3 brass insert to be melted in. This single screw with the lip and groove is enough to secure the two halves together.