I would like to give you another idea of some of the changes here.
The first thing is the second track under the hill/mountain that I added a short time back.
That was a pain to do without tearing out the hill over the top it. And, yes, there is more clearance there than it looks.

Ok, now on with the show!

That's a nice scene with the Diesel sitting next to the Steam

I thought so. :-)

Very nice work!

Great views!