As I mentioned previously, I used a cut-to-size piece of plexi-glass for the screen. Behind this I mounted a sized screen shot from the game that I printed with a color printer. I had to play around with the brightness and the contrast of the image to get it to look right once it was back-lit. It wasn't quite a simple as print screen, copy, paste, print :lol. Behind this I cut a piece of clear plastic from an document holder, just to give the paper a little extra protection should any sweat get up in there. I used plain old scotch tape to secure all 3 together, then I used dabs of hot glue at the corners to hold it into place.
Behind this I hot glued 1 layer of the green lighting film, and behind the green film I mounted the LED screen. The LED screen spits out light in every direction, so I used electrical tape on the sides to block it out and aluminum foil on the back... this way all the light goes out the screen and you don't see much of a glow when you look at the insides.
Here's what it looked like at this point:
That circuit board off to the right is the circuit board from the voice amp that I disassembled. Here it is with it in place and with the detached volume knob in place through the front hole. Again, everything is being mounted with hot glue... that stuff really does the job if used for the right applications!
Here I have the speaker mounted behind the speaker grille. Before I mounted the speaker I glued in a small piece of black screen (see above pic) to give it the proper look if anyone is taking an especially close look at it.
Here it is with everything but the batteries and the mp3 player installed. The black push-on/push-off switch (top left corner in this pic) is held in place with, you guessed it, hot glue.
Here's another view "down the barrel". It looks like it would dig into your arm, but it really doesn't. The wires just compress down, the only thing I even sort-of feel is the volume knob. Even so, I still have enough space to wear this over my jumpsuit's sleeve without any problems.
If you have big meaty forearms, this may not be the prop for you, though. I will take some interior circumference measurements and post those once I have them.
At this stage I still needed to attach the hinge (more detail on that later), add the elastic attachment straps (pics to come), and then use some silver paint to give it a few bits of "character" on the outside.