Thanks all for pushing this.
My 2 cents is that while it would be nice if the kit included them, I can come up with the "fiddly" bits / trucks / couplers on my own. Instructions are nice, but I'd rather have a photo copy of some pictures / a scale drawing.
What I desire for $140 ish per kit is the stuff I can't easily come up with on my own, i.e. a dead accurate body / underframe and decals.