Check your PM.
Y&R--I believe that Key McKee had a post that addressed this. I saved his posts and will have to check, but I believe he said 2001 was when they changed.
My boat is a 2001 model that was built in 2000 and has wood in the transom, aluminum backing for the rails, etc and something that is not wood under the deck. Maybe I have a "transition" boat, so to speak. There are no stringers in the hull.