Since I have decided to tear down my layout after the Holidays and then expand it and rebuild it I will be laying new track. As such I now have some questions, which I will post in several topics staring with this one. I have decided to go with Atlas code 100 track due to its availability at my LHS. I will be using WS risers to make the grades and such. Now I need something to go under the track and top of the risers. Any recommendations? I will be buying the track in small quantities and replacing it in small sections. Since I have to have the layout up and running (a condition imposed by the boss; I am only allowed to have the layout if the trains are running. ) I will be reusing some of the EZ-Track. This time around I am doing it in small sections.