John,
I see what you mean! That UP loco is
way outside the height as well as width gauges for British rolling stock!
ARhian7, don't worry, we're only kidding, doing your own thing is fine, of course.

In any case, your composition is so good, it doesn't matter what you show, it always looks good (and that's the point isn't it). From
my view point, if you show steam then that's even better, European steam even better and if it's British or Irish steam, then (for me) that's absolutely perfect. Others would see it differently and that is entirely the way it should be: unity in diversity!
However, if you really want to see really sumptuous coach interiors, try the (UK-LMS) Duchess (or Coronation) or the (US-CNJ) Blue comet DLCs. All these have a number of locos and a full set of lovely coaches for the trains. Very relaxing and comfy to ride along in!
I keep saying this, but I do wish someone would do part or all of the CNJ route between the outskirts of New York and Atlantic City in the correct period for the Blue Comet as the set really deserves it. I can't do anything because I know nothing of US operating and signalling practice for that or any period. There is a DEM-based basic route on the DLS 0to use for the elevation data.
Peter.