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Definitely DecoderPro -- it's a life saver. But in the meantime, the simplest way to "tune" DCC locos is to use CVs 2, 5 & 6. CV2 sets the starting voltage, CV5 the top voltage, and CV6 the mid-point voltage. Using these three, you can get your locos operating pretty close together (and more prototypical to boot, since the top speed of an unmodified loco approaches 200 scale MPH at full throttle [;)]). <br /> <br />Rather than going into all the ins and outs of programing these three CVs here, I suggest you go to the Digitrax site and download their Decoder Programming Manual. Even if you're not using Digitrax decoders, it has a great explanation of how to use these CVs (and the full speed table, if you're adventurous) to customize the locomotives response curve. You can find it at http://www.digitrax.com/pdfdocs.php . <br />
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