For what its worth, we have seen zero issues with the single rear wheel from the factory. They have been on the road for about 2 years now.
One of my reps just came back from a four week demo trip, so he lived in that vehicle for a while and raved about the drive/handling. When we first started building on them, that chassis seems to ride on the bump stops. We ended up having MorRyde design a custom suspension that improved the ride dramatically. He got 16-17mpg and it handled well. It's also a very comfortable cab with good leg room. For whatever reason, Ford loves to short the passenger on space. Even on the transit, the shroud makes it difficult for the passenger to move from cab to coach.
It was funny, I watched a video that a dealer did comparing the Winnie Trend to a Dynamax REV and they called out our 7 cubic foot fridge as a "waste of space". Their 5 cubic foot fridge took up much less space. Last time I checked, if you need extra space you could put cereal/flour/mac and cheese in the fridge. I don't think you can put eggs, milk, cheese in the overhead cabinet.
You may get a few more responses in the Dynamax forum as opposed to the general forum.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).