My DIM (do-it-myself 🙂 version, still under development. I’m using a very sturdy Gainta enclosure for portability. I hope that my personal touches would not disqualify me from this contest!
The protective window has a narrow overlapping edge (grinded by hand, just like the opening hole) that prevents it from falling inside, should it be pushed hard from the outside (it would be glued anyway). The very edge of the edge will be chamfered to fit more snugly with the front panel.

I have recently dropped the idea of using the 8-pin connector of the LCD board; the LCD will use the 4 thick but pliable copper wires not only as a precisely 3D-adjustable support but also as electrical connections, together with another 4 flexible wires that will connect to the main PCB in various points – that would simplify my PCB design a lot (the enclosure is quite spacious, the PCB not as much).
The power switch is mounted on the side, under the enclosure’s shoulder, to protect against accidental flipping.

The center metal button has a white LED inside, that will blink in unison with the sound from the internal speaker. This button and LED will have internal counterparts (selectable via jumpers), to allow testing without having the cover in place.