Thanks, Lloyd.
1. The Forte was developed from the G2Jr which was developed from the G350SE. With the Tribute, I did a ground-up re-design. I based it on all of Arnie's technologies, but I re-looked at everything. Including why we needed so many drivers, and with the attendant difficulty of matching drivers.
2. Adding the SuperSub to the Tribute would be somewhere above the Quartet in performance. But I would have to re-look at the servo-design of the SuperSub, just as I did with the Tribute.
3. The Prime+ and the Tribute have my latest thinking in servo-control. The Forte is still one generation back, and the Quartet another generation back. However, in terms of the ranking, there is more technology in the Forte with 2-channels of servo-control amplification - the two 12-inch woofers are individually powered. I also went simpler in the composite technology with the Tribute. The Forte was a bit of an overkill with its 11-layer carbon-fiber reinforced composite sandwich.