I've had a set of Weaver NYC E-8's forever - since they came out. Nice locos, but they've been on the shelf for a decade or more.
A friend got a set of UP's at auction recently, and noticed that they have no exhaust stacks (compare with the K-line, etc.).
Huh. Go figure.
Probably this was discussed here a million years ago, but I don't care. It's just funny.
The little quarter-inch crew gets teary-eyed I'll wager, what with all the smoke in the cab.