For the average tourist riding the C&T, the current coaches look authentic. Parlor car is a superior ride and very charming, tourist is a good ride, open gondola with freedom of movement and regular coaches which look old. All seem to fit. Also, the paint and lettering look good. Very nice looking and uniform train set these days.
There are two new tourist class cars coming due to demand. The interiors will look authentic. One thing the C&T could use imho is a Silver Vista type car.
Now if we want to count rivets......