I've been working on it a long time, but it's finally ready for sale!
The TG16 only version of the region mod circuit is ready for sale.
I designed to make it super easy to install on the US tg16 console, does not work on any other NEC console, does not work on the PAL tg16.
It's as easy as solder down, cut the 8 pcb traces, run 3 wires to a switch, and mount the switch somewhere on the console shell.
http://www.game-tech.us/store/There is an option to buy the kit with wire and switch or pcb only in the little drop down box.
Shipping is only set up for US and Canada, but that should be the only countries interested in this kit.
I only have pri mail for US and economy for Canada for now.