Turbo Grafx mod (JAP games on US console)...

[radiator]

Anyone tried http://www.massystems.com/TD-Mod.html ?

I'd love to do this as it'd be so much cheaper than those (rip-off) convertors.
I'm pretty good with electronics/soldering, but I really need a better guide that the one above.

Is there more of a step-by-step guide that also tells you exactly what the circuit does?

thanks