In The late '70s in Norman OK I had a model railroading/railfanning friend named Bob Osborne. He was a Boeing mechanical engineer and worked on the SST project. After it was canceled he moved to Norman to teach refrigeration mechanics at the Oklahoma Postal Training Center. One of his prize possessions was the original HO model of the Minuteman missile train as seen in the this post. It was fascinating to say the least. As I recall it was mostly of Athearn origin. He moved back to Federal Way WA before 1980 and I lost track of him. I often wonder what happened to the train.