OK, I hear alot about Regional Modifications for the Turbo. I have a question, what is the reason for making the modifications and the desired effect of the modifications?
A region modification allows you to play both US and JP HuCards on the same system without the need for an external adapter like the Kisado, which is no longer manufactured and is quite rare. It is a modification of the HuCard slot using either an 8PDT switch or logic circuits. For JP systems, the HuCard slot needs modification and the 29 pin on the Hu6280 processor needs to be grounded. A region modded Duo allows you to play ANY game, Hu or CD, except for the 5 SuperGrafx games.
Oh, and to answer your e-mail, sorry, sold those out!