Thanks for posting this nice MOC. I really admire all MOCers doing this:
picking a subject, finding pictures, thinking colour scheme and so forth.
I like your colour scheme. Is it correct the train is 7 studs wide?
I do not want to sound negative, but I think the proportions around the middle
are a bit strange. I found this picture:
.
It looks like all 7 middle windows are equally wide, but not on your model.
You probably want to compensate for the width of the motor block which is too wide, but
maybe it is better not to? If you have modelled in LDD, try to make all 7 middle
windows the same and check the overall look...