Cleaning up I found audioXpress articles from 2/02,3/02,4/04 called "Big Mike and the Jimmy" Tube based with good information on the design. The authors name is Paul J. Stamler.
Yep ... we threw a Paul J. Stamler article about a couple of months before the G9.
I may have included it as part of an GDIY Up-Date.
Too long ago to remember what people opinions were and Byron and I were distracted with the G9 at the time.
I'll have a dig around as see if I can find it. That may have to wait until I get home from holidays. :green: