QUOTE: Originally posted by Avondaleguy The "code" of the track refers to its height (the rail) as measured in thousandths of an inch. Code 70 is just another way of saying 0.070" tall rail. If you aren't sure what code rail matches the track you already own, you might try just buying a single piece of track in each of the various codes, and see which one(s) can mate with your track. If you don't want to invest in track like that, then maybe you could take a piece of your track down to a local hobby shop or even to a train show, and ask to compare. I strongly recommend, though, Kato's Unitrack. For a beginner, it affords a wide variety or rugged and reliable track and is very forgiving of errors in the subroadbed or installation. It has an oversized rail which doesn't have a realistic railhead cross-section, which is why I'm not using it myself, but it'll probably be a long time before you find this unacceptable. I bought a basic loop of track (the K1 set) for just over $30 American at the last train show. This set contains about half of the amount of track you already own, though it does not include any turnouts. Their K2 set includes a pair of turnouts, and of course you can buy all of their track components individually rather than in sets. Kato also makes a transition piece of track, which probably would allow you to use your existing track with it. I hope this helps! I cannot reproduce the article (and I imagine the forum moderators here frown on such a request), but I have been modeling in N-scale for almost 20 years and have tried all sorts of track brands.