Ok, just posting this for the slim possibility that it actually is something of interest to anyone on the forum. I was recently communicating with a guy, who is out in the hills of California, who claims to have acquired lot's of unusual prototype engines from his uncle. He said that he has what he was told was an original Mark III frame (although missing some support structures), but was acquired from SA many years ago. Obviously, I'm very doubtful about a claim like that. I also know nothing about original Cobra frames. Thoughts, comments, flames?