> To be honest I'm not sure, try http://www.seuservice.com
>
> System16 - The Arcade Museum

Ok. I've just sent them an e-mail. I hope they will take it under cosideration.

P.S.
Rummaging with Google I've found this site: (umh... don't know if I can report it here. If not please let me know as soon as you can and I'll remove it, or feel free to remove the link by yourself if you can. Thank you) http://www.startechjournal.com
While inspecting the publicly downloadable index (Index1to23.pdf) I have found an article that may, or may not, contain an answer to the problem I'm experiencing: "Sega Naomi Crediting Problems Solution"
To download that issue they want to be payed. It is a commercial magazine for coin-operators so that's ok by me if they want to be payed for it. Unfortunately I'm not a coin-operator but just a last-minute hobbist. So I ask, is there anybody out there who can have access to that magazine and inspect throughout the above-mentioned article?
Endless thanks.
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N.