RGB/S-video mod for PC Engine DUO-R

[FM-77]

I was wondering if somebody know of a way to RGB or S-video modify a PC Engine DUO-R.

I was checking out Gamesx.com and found this, but I'm not sure if it works for this particular console. It does say:

The other caveat: this will require open-console surgery. Regardless of the model (PC Engine, TurboGrafx, Vistar) you're going to have to open the console and do some soldering. The good news is the RGB can be tapped from either the video chip itself, or the expansion bus, so these mods will work on any and all PC Engine or TurboGrafx system. This includes the white PCE, the Core and SuperGrafx units, the GT, LT, PC Shuttle, LaserActive, the PAL TG-16, the Korean Vistar, everything! Well, maybe not the clones.

But it does not say PC Engine DUO there. He he, but I guess it works for the DUO as well.

Anyway, are there other guides for this somewhere?

Thanks in advance (and I know this is a pretty dumb question!   )!