Yep, I've heard about the native component mod for the SNES. I've tried it on a few diffent SNES variants but I always get washed out colors (yellows seem to be mainly affected).
Yeah, I've heard the complaint on yellows. I hoped someone by now that was a professional EE would design the best circuit amp for those signals, but as it stands only a generic circuit is available. I would like to know the results if you add's steve's circuit to one that has the right chip, do both mods and compare results from the same unit. I guess you're already suggesting Steve's will be better.
For the sake of it, I'll try to do a side by side comparison sometime. I might also add Ace's BA7230 based circuit to the mix.
Steve's PCB has it's own issue(s) actually. I've witnessed some distortion or an undesired green tint on the top of the screen. The effect can be minimized with a sync cleaner or by adjusting the Y pot on the PCB. That said, overall, Steve's circuit does a better job that the native SNES component IMO.