Thanks for all of the replies everyone - Jeffrey, yours in particular looks super clean - nice work - did you build the side storage boxes yourself?
I just called Adventurer/EagleCap and they pretty much didn't have any specific info on the '07 since the company has changed hands so many times. His recommendation was to support the entire floor since that's the way it's designed, which makes sense I guess. Maybe a "composite" approach might make it light and strong - like maybe 1" of high density foam + a sheet of 3/4" ply or something ...
