My grandfather fired a Triplex back in the day ( I have pictures of him on the engine when it visited the Wyoming Division) and yet I can't bring myself to picking up a model of one. They were rarely seen on the point of a train and they represent a era older than what I model. But they sure neat and someday I might break down and purchase one. I'll have to check the cab number before I do though. Thanks for sharing the clip.
Earl