Thanks for the kind words and support folks. OK Steve nobody here is biting so why did the mushroom wear a lampshade at the party? The loop around canyon track passes over what will be a staging yard and crosses over the aisle 64 inches above the floor. Now I have walked into it a couple of times already and have scars on my head to show it so thought I needed some of those telltails railroads used to use near tunnels. Here is my version.