A very recent HO Freight operating session in UK

[torikoos]

Koos,I my Bachann DCC equipped GE70 tonner wasn't to bad on sitting the momentrum CVs and that seem to smooth the operation of this engine.

If I may.

I haven't fooled with my new Bachmann DCC/Sound S4 momentum CVs yet since it seems to do quite nicely with the DC sitting I use for my P2K and Atlas engines.The S4 will be used in the Tech 6 DCC mode.

I use a different setting my Athearn RTR and a completely different setting including the start voltage for my BB engines..

I will look into a ESU Loksound decoder for one of my CF7s since I like the way your SD handled..

Your settings will most likely vary for every engine, even two of the same make and same decoders, due to mechanical tolerances etc.
The biggest win you can make is to ensure all electrical contacts are clean and secure,and the mechanisms are free of dirt, blemishes and properly (not overly) lubricated.

If you like how the SD9 Handled, you can see it in action here too: <!-- m --><a class="postlink" href="https://www.youtube.com/watch?v=lBV5EgCOzJo">https://www.youtube.com/watch?v=lBV5EgCOzJo</a><!-- m -->

I know you see a UP SD7 (long hood forward configuration), but it's the same mechanism and decoder by the same owner (Brian Moore) on his layout. it has very similar, if not exactly the same settings, and a custom sound file giving that lovely EMD 'whine' when decelerating etc.