Dirk: My plan is to have all the track visible but you have thrown an interesting idea at me and one I will give serious thought. The whole lower level yard acts as staging for the upper level but I do want some switching and industry. I have been scratching my head thinking about how to scenic the lower level. So maybe some building flats would work to give it a big city feel. I had planned to make some building flats to hide the helix. Anyway thanks for adding a wider vision to my planning process. Carl: Thanks for the kind words mate, and welcome to the hobby.