Is this the famous Hal who owns too many boats (BMC customer)?
We have two 11Cs here at the Vallejo Yacht Club, there were several S2s in the Berkeley Marina when we left there 18 months ago, one of them was the 11A. I'm in contact with another 11C owner in Ventura, CA. So there have to be quite a few S2s here on the west coast. You can message me with any questions, we've basically done a total refit of our 1985 11C, but still working on the interior refit. We do live aboard. The rig is exactly the same for the two boats and the systems very similar except for the CC differences. The owners manual doesn't provide a great wiring diagram, just the basics and who knows what has been done to it over the years. Our original panel still works great, but we have a new panel to put in because we wanted more breakers and at that time, we'll finish cleaning up and labeling all the wiring. (My husband is a marine electrician...)