I saw 4 or 5 up close and personal at the Livingston, MT train depot one evening a couple of years back. I’ve heard that the car behind the fuselage carries the paperwork, but maybe it’s the tail?
Nothing is in the car at the tail. We have been working with Spirit to use it for delivering parts kits but that’s been an uphill battle. So for now it just protects the tail and provides a place for taggers to do their work. People in my work group have ridden the train all the way, doing studies of locations where the fuselage gets the most damage from coming in contact with trees, brush, rockfall and such.