A revised version of this layout plan with an accompanying article, has just appeared in RUN 300 August/September 2018 issue of O-Gauge Rail-Roading! As always, Allan and the editorial staff did a beautiful job with the article, please check it out!
This is a unique layout plan constructed from two 4X8 sheets trimmed to fit together to make the "L" with that access and viewing space. Using Atlas-O, the outside route is O-45 minimum. The inside route is a loop-to-loop climbing a 3% grade to a mountain top. It features a small yard with a yard lead and run-around track. The two routes connect for a long run from the yard to the mountain top, with two reverse loops.