Thanks, Steve. It does bring out many of the details and will help. I'm still wondering just what that dark rectangular shape is above the steam chest. Is it just a shadow from a step?
A number of pictures have shown up. This one shows the "other" side of a similar locomotive and answers a lot of my questions about what went on on the back side.
Here's a shot of progress on the models. There are two of them, one for me and one for a friend.
There will be more as it goes along.