The photos on the site are a good example of what's inside. Nothing secret in there, just honoring my word not to distribute pics of his work. Which some of is a collaborative effort with Gordon Rankin. That's all. He didn't ask me not to, it was just understood that I wouldn't be posting pics of his design, which is his IP.
Sure these amps share a basic circuit design going way back , but this is his design. You are reading way too deep into it.