I just put the AF811 on it the first time today. The short bed Arctic Fox now sits farther forward on the bed than it did on my short bed F250, but just slightly back compared to the long bed version due to the generator header pipe. The front jacks interfere with access to the lower storage compartments, but these will become over sized battery boxes in the future.
I haven't driven the loaded 5500 enough yet for feedback, but with no suspension aids it squats about 2" in the rear and still has a 1" before the overloads kick in. I think that once everything is loaded in the TC and the trailer is attached, the overloads will touch the pads. As long as the truck stays close to level, I will not install my StableLoads. The 6.7 with 6-speed definitely has more power than my 6.0 with 5-speed. I'm still getting used to the Cummins I6 torque and horsepower peaks at 500 RPM less than the PowerStroke V8.
We're planning on keeping the Arctic Fox for up to five more years before getting something larger. The new truck opens up many more choices for us (maybe even a bigger toy trailer).