One of my ongoing projects has been speed matching all of my locomotives, so far I haven’t been too successful. It appears the crux of my problem was BEMF, it appears Digitrax decoders turn it off when you use the advanced consisting (CV19). To go around this I just set up the locomotives in a consist and set up my speedtable that way. The lower speeds are much harder to set up without BEMF on (an amazing difference). I shot a short video (only 46″ of track to test it on).
The first locomotive (DM&IR 210) is a Kato SD38-2 with a Digitrax SDH164K1B (sound decoder) and the second (EMDX 9003) is a LifeLike Proto 2000 SD60 with a Digitrax DH165.