Finally finished adding SOPHIA to my already modded 5200. My current 4 port model now has composite, s-video and RGB. There are required pulled pins for the composite/s-video board, but they do not affect the SOPHIA mod. I thought I would post some pics of the different video quality (and colors) from the various video feeds. I am pushing them through a Sony PVM. Pay particular attention to the bricks and the cave outlines as those are static images (more broken-up artifacts with composite than s-video). My PVM tends to translate composite fairly well, so there isn't as much of a difference between S-video and composite as one might think, but it does get extremely noticeable on consumer TVs.
Composite
S-Video
SOPHIA RGB (Updated to FW 1.3)