I agree with Andy and Greg that they do not have to be long cars just newer types. Longer flat cars,gondolas and box cars. both companies to sart thinking out side the box for a change. Yes the younger generation is going to want this type of equipment. Just look at the six axle locos that have come out. Gets old pulling all these old 40 ft cars. I for one am not young but I would welcome newer rolling stock. Also make sure you install the rollerbearing style trucks with rotating caps, now thats cool. I have installed a lot of these trucks on some of my cars that have build dates in the 60s about the time these trucks started showing up. Later RJD