One of the originals is often seen on various preserved lines, such as the Festiniog. Roundhouse has produced a model for 32mm/45mm guage. Does anyone know of any models of one that have been built for 7 1/4" or even 5" track? Alan MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.