Well I got my a few days ago and finally got around to buying a 9 volt to try in my counter until I can get a stick battery and charger. Unfortunately my counter was DOA and seems like there is a short somewhere between the battery connector and display. In an effort to try and double check connections at my switch, etc. I decided to pop the cover apart using Robiwon's link of the assembly instructions for the G&P kit.
Let me tell you I can only hope the shroud goes together easier than it comes apart because taking it apart was no small feat. I was very tempted to try prying along the seams but I did not want to leave pry marks in the plastic. It took well over an hour to work the two halves of the shell apart and it's far from being something suited for the faint of heart. Eventually I was successful getting the shells apart but I thought I might add some observations about the shells.
1. For anyone considering drilling out the slots in the SPAS cage be warned that on the ejection port half of the shells there are wires run along the inside above AND below the port. Not too mention the run front to back.
2. The fuse was place in a nigh unreachable section of the grenade launcher sitting right above the launcher trigger area again on the ejection port half of the SPAS cage. Also to make it extra impractical the fuse and holder are glued to the inside of the shell.
3. Personally I had wanted to swap barrel covers to use a thinner barrel which more accurately matched the move PR and I hand wanted to replace the front barrel support with a more accurate version. But what I didn't realize is that the countdown feature of the LED readout it tied to a sensor in the front barrel support so no swapping barrels for me.
4. The wiring for the counter on/off switch and battery terminal was an absolute wreck of cheap brittle wire and hot glue. It turns out they had both legs off the LED circuit board tied to the common pole on the switch so on or off it never got power from the 9 volt.
I took a few pictures with my cell phone and will try and upload them a bit later.
that first link was exactly what I needed...had to see inside the shroud, so I knew where the pegs were

!
going to give this sucker another try today.