Now I know why people rave about how smoothly Williams locos run: this loco rivals the best running/smoothest diesels I have (Lionel U-Boat with the new-for-2011 revised electronics) and has the most linear response to voltage I have ever seen. Nice.
My next comments are not knocking this loco - I like it a lot, but I think I will re-paint it and maybe add a bit of detail. The molded detail is okay - but the paint, particularly on the top of the unit looks a bit too glossy and toyu like-satiny and this one has a lot of bright, chrome-like railings and such I don't see in photos of the real thing.
Did trainmasters have chrome/shiny railings, etc?
My intention is to re-paint this in UP Armor Yellow and Gray with silver trucks. I'm fairly certain UP never had any Trainmasters, but that hasn't stopped me in other cases and it would be a fun project to do that and add some more detail and cab figures, etc.
Anyway, it sure is a nice runner.