Ours is a 4winds too, interesting to hear you are having problems. From what I was told by fourwinds when I called them and told them this camper that has been used less than 2 dozen times had this problem they told me basically it could NOT be their fault,b/c they obviously are perfect, and our warranty is void b/c we bought it 2nd hand.
The leak is where the frontcap meets the roof. Even though it was well sealed, flex in it allowed water to get in, all the wood over the bed (front bedroom 5ver) must be replaced, some fiberglass, ect.
Thing is, we NEVER saw water, NEVER. We brought it in b/c the sidewall delaminated OUTSIDE of the unit, and thougth it was a simple fix...boy were we wrong.
But..in the end it'll be worth it, I always say, as long as I'm in my camper, I'm only sleeping with my own bedbugs, when I have to hotel I'm sleepin with everyone else's.