P51/ Lee : I am sure you may already know, but if not for your information the "Classic Trains" special publication in 2019, available from Kalmbach Media, called "Trains Go to War" has a super article by R. S. Twogood titled, "Railroads at the Front" which describes and pictures the narrow gauge steam and gasoline powered locos operating on track that was erected (temporarily) parallel to the front lines in WW 1 . There are some good pictures, depicting engines like yours at work and the fact that the track was laid down in panels (like sectional toy train track), by hand, directly on the ground, with little or no grading or preparation. Often destroyed by enemy action during the day and repaired at night.
Pictures clearly show what a great model you have built. Thanks for sharing the pictures.
Don
