Don't know if this is relevant to the current discussion, but many
years ago I photographed one or more CP gondolas locally that had their
sides extended to boxcar height, for use in woodchip service. At least
one had a huge multimark on the ends, up and over and around the ribs.
I made a model of the car and believe photos of it were published in a
hobby magazine a long time ago - can't remember them all!
Bob Boudreau
Saint John, N. B.