If it was a Champion, it would have 4 lbs of spray foam in there-and still not be attached.
Actually I have a 6" wide piece of rubber attached to the body + the door. You can see it here before I rebuilt my stairs.
Great find on the cup holder!
I'm embarrassed i checked all over for a cup holder for the top of the doghouse. The make them for every year BUT 95-96. I never thought to look to see if there was a stock one.