Let me first say that I enjoy the St L & NA very much. It's nice to railroad around in a town my wife and I were married in.
I wanted to let you know, if you haven't already seen it, the article in the Narrow Gauge & Short Line Gazette about the Oklahoma lead mine. There are some historical photos of Picher mines, a really nice model and a scale drawing. Might be helpful for the O&N.
Also found this site with an exploration of what I think is the M&NA tunnel.http://www.undergrou...om/holiday.html
BTW, does anyone know of a V scale power shovel, ditcher, track laying machine or some other huge load that will work on TOC? It would be nice to have 2-3 engines, idler flats etc. and spend a day horsing one of those from Seligman to Berryville or vis versa, dealing with speed restrictions, grades light bridges and rail , etc.