@soocoolsim - I decided to tweak all the train cars to make sure they are the same as the others with the connectors bolts facing the train cars and the stairs all skinny side in and as far out as possible. All the plumbing was upgraded too. The uploads have pics in them, so I'll probably delete those on my site to make room for others.
VSOE:
Sleeper here: https://www.thesims3.com/assetDetail.html?assetId=9357587
Diner here: https://www.thesims3.com/assetDetail.html?assetId=9357585
Royal Scotsman:
Lounge here: https://www.thesims3.com/assetDetail.html?assetId=9357584