I am a fan, in general, of the Lionel Freightsounds cars. I am hoping they add the Vision Line Baggage sounds to a shorter REA Baggage car. But I've been listening to real trains and it strikes me that the clickety-clack sound is not car specific like flange squealing or flat spots but more location specific to a non continuous piece of track as many cars make the sound while the train passes. I think the best way to create this illusion would be with a fixed building with an infrared sensor. If Lionel could create good sounds in those little work houses, I'm sure this could be done.
Anyone else agree?