I have read a few articles in MR and in some DCC manuals about speed matching loco's but am still unclear on how to do it. Here is the list of locos I have to work with:
Athearn F45 factory Tsunami sound equipped
Athearn GP35 current Digitrax DH125 decoder, possible future sound equipped
Athearn F7 current Digitrax DH125, possible future sound equipped
Atlas GP38 current factory Atlas decoder, also possible future sound equipped.
I also have a Kato SD40 and P2K GP18 but both need some work before I can even tackle the electrical and put them on some rails.