N Scale Kato SD70MAC with MRC Sound Decoder. Many people ask how they sound and I find them very good and very reasonable. They are also super easy .brbrThis is a comparison of N Scale Kato F7 locomotives, one with stock headlight and the other with a Digitrax decoder installed as well as some custom lighting .brN Scale ! How to install Kadee HOn3 electro magnetic uncouplers in Kato Unitrack. by Fifer Hobby Supply.brFirst test run.