I guess since guesses are getting close enough I may as well just tell you

It's closest relatives are probably the Bandmaster (F-2B) and the Bassman, it's basically a Bassman topology without the cathode follower at the end, but keeping all the component values of the F-2B for the low end response.
Also in looking at things while I designed it, it's basically what would happen if you take a LUX and replace all the component values with the values from PAX. Gives you best of both worlds in my opinion, overall sound and feel of the PAX with a little more bite like LUX. I messed up the enclosure so I still don't have it boxed yet, but from my initial sound tests it's a winner.