A return visit to Durango must happen at some point, especially given #20's frequent visits there as part of the RGS fleet, and because of its starring role in the movie "A Ticket to Tomahawk" in 1951.
That movie played a significant role in saving the Silverton Branch, as the attention it brought to the line across the USA (being the first movie to showcase it to a wide audience, in colour and in the fall) drew tourists to it, eventually turning it into the major attraction that it is now.
Could, although this is a speculative idea on my part, #20 ever be returned - temporarily - to its movie guise as Tomahawk & Western Railroad #1
Emma Sweeny and run, either at the museum or at Durango, at some point in the future? The thought of it running along the High Line again is very interesting, to me at least.