I reworked the region mod pcb for Turbo Duo - now it's super

[game-tech.us]

I do plan to sell the pcb ready to instal, but prolly only through stoneagegamer if they are interested.
I only made 3 to test with and do need to change it up a bit before releasing it as well.
I'll update here once I know any more details.

https://www.youtube.com/watch?v=BJk4xeGhlKI