Just joined and sent you a PM, but it wasn't showing up in the sent messages folder, so I figured id post here as well.
I recently came into possession of a wesmar 700ss and Im working on retrofitting the signal processing box to bring it to the 21st century (to work with a laptop, no analog video output).
You mention having schematics for the 500ss. If you have 700ss schematics that would be phenomenal, but I may be able to make use of 500ss as well.