Each year for our town’s annual Holiday Trees Display, featuring 30+ trees each decorated by various businesses, I do a Christmas tree display featuring Lionel trains of course. It is typically the standard train layout under a tree. Each year it gets a little more involved than the year before. Last years setup was really cool. But this year, about a third of the way into it, I wished someone had talked me out of it. I decided I would tackle an idea I had always wanted to attempt. To have a...