I have two locos that I want to speed match, but I am not sure which CV's to adjust.  Both locos start moving at the same time.  The first loco is faster than the second unit at slower speeds, but as the speed increases they get closer in pace, but the first loco remains just a bit faster than the second.

Which CV should I modify to adjust the rate of speed at lower speeds?

Which CV should I modify to adjust the higher speeds so they move at the same pace?

Original Post:

There are some electornic projects I'm thinking of doing for the Pennsylvania & Allegheny.  Some are for DCC but others are for LCC (NOTE TO MODERATOR: Perhaps it should be considered to expand this category to include all Model RR Electronics as well as LCC!).

Hi there. I have a Heljan/Walthers HO/DCC turntable code 89121. It has been in storage for about 12 months. I took it out today and connected it into my new layout. It calibrates fine but when I try and program it, I get an ERR 1.

The manual says that "There is no contact to the bridge. Please try to clean the contacts as described. Please also check the wire-connection."

I live on the old IC, now CN mainline.  The tracks are about 100 yards east of my house.  Yesterday my wife and I were working out in the yard when the Sunday local stopped to drop off some cars at the grain elevator just down the road.  The air was filled with the usual sounds of a freight train and my wife asked about them.  She said she had never paid attention before.  So we listened as the brakes squealed and the slack ran in as the train stopped.  There are a lot of sounds audible from a few hundred yards away (distance to the grain elevator) as the crew