I am working on a model of a double-track PRR snowplow, and looking for more data. I have some photos (including some CR plows that used to be PRR) - and a model magazine article from 1992 about building a CN double-track plow (the author refers to an earlier article from 1984, which I don't have.) I have already seen some discrepancies between the CN and PRR plows (both were built by Russell in Ridgway, Pa.,) but as far as I can tell, each order was customized for the railroad ordering the plows, so I am looking for photos or drawings that show one or more of the PRR double-track plows, as they were actually built. If you can help, please let me know. If you are attending the Annual Meeting, I may have an "in progress" model in the model room.