Would it perhaps be possible to allow for a skin setting or perhaps side-grade variants of some sort? I'll admit I always kinda liked using the old Locomotive model being used for the armoured one, and was hoping it might be possible to bring that back as an option... but i wouldn't want to just waste all the effort you put into making that new one, but I figured it was worth at least asking >w<;
I also liked the old wagons too, though I get why their lack of ability to stretch properly was an issue.