I love the floor plan, however this is from the 2013 Model Review on the Winnebago web site. You will probably have to wait a few months to see one in person.
The two tanks, black and gray, are separate, looks like you would have 4 tanks, 2-gray & 2-black. I am sure the 2-grays will drain as one, likewise the 2-black tanks.
I would imagine with a 22K chassis the wheels would be 22". Just checked the chassis specs, on the 35B & 35F the wheels are 22.5"
The big negative for me is the "Short" queen bed, if you are over 6' tall your feet will hang over the bottom.
Fred and Bonnie
2005 Dolphin LX 6375
Abby, Ruffles & Scarlett, "The Cats"