Ok, good thing that you're at least nailing SOME down lol... Try to put at least one nail in each piece of track. For later, when you're thinking about roadbed, cork is the traditional way to go, but, if you want to run a bit quieter, get the Woodland Senics's special stuff. It really dampens the noise of the wheels! A link to their site with info about the roadbed stuff NOTE: They use frames, so if the page looks a bit weird, just remove everything but the www. woodlandscenics.com and find it with their navbar on the left.