My dad's ordered the RS4 to replace his 996

However, having read all the posts on here about wear and tear and them being tight fitting, he really wants to change to the recaros. Now this is the bit that I can't het my head around.
A couple of weeks ago the dealer tells us that there's gonna be a 2 week delay, build week 17 has now moved to 20

Now I don't build cars for a living, at least not audi's, but common sense tells me that surely, even a beast such as the rs4 wouldn't spend longer than 8 weeks in the production line. And am I wrong in thinking that the seats and most of the trim are probably one of the last things to go in?
So can someone please tell me if this is true, and that in this stage in the process there is no possibility of changing the spec.
Many thanks,
James