Yeah, I followed your progression through the years, back on Audiocircle.com. I was a moderator of the DIY forum for a while. I met Dr. Geddes once and was invited to his house to hear his setup. I just always felt that the proportions of the Jazz Modules were just right! Nicer than my much larger M2s.
I think you used SEOS waveguides in a future iteration if I am not mistaken. I was an active participant in that thread and had something to do with their shape. I did the math on the profile. I was quite pleased when they measured as well as I had hoped. Too bad they are not longer available. It seems that is the missing link to do something similar in nature to the Jazz Modules. The 10" driver you used was also probably hard to replace?