Ok I don't have stringers. Seems the flotation foam holds the floor and IS the structural integrity. Google even brought me back to a couple threads on this forum where my type of boat was torn apart just to find out the same. The only wood is in front of the transom which is a rather small box where the pump was removed from. That will get replaced. The floor is dry and sturdy. The only thing I need to get right is putting the skin on a new transfom and securing it so it's well beyond safe. The first foot of the floor will be replaced at the back and reinforced to the transom from the inside. Am I on the right track?