For you N Scalers, installing the sound decoder of your choice into our N Scale models is a breeze! In our latest YouTube video, Joe Goddard walks you through the straightforward process. In the demonstration, Joe uses a Tsunami2 TSU-N18 decoder, identifiable by the "New Smaller Size" yellow square on the packaging. As long as your preferred decoder is a Next18, you can simply plug it into your locomotive, and you're good to go! This method also applies to non-sound decoders. | Broadway Limited