I think I'll interrupt the discussions about the cost of screws to mention a steam era movie that played recently on TCM called Sullivan's Travels. This movie, filmed in 1941, stars Joel McCrea, Robert Warwick, and Veronica Lake, and includes quite a few shots of trains powered by steam locomotives and, in addition, quite a few shots of frt cars of that time. At least one close up is of a trussrod car. The trains appear to be SP...big surprise. Al Westerfield, who has an interest in old movies including trains, may have mentioned this one before but...anyhow...

Mike Brock