1]Long enough to accomodate two "SP AC-12 Cab Forwards"
or four diesel engines.
2] Railroad doors will swing.Enhanced new door latching
to keep doors better closed.
3] Access to interior from above (for Super-detailing machinery
and work crew).
4] New rooftop watertank added to kit. New upper windows
added to the model.
5] "Tweezer-Tilt" windows throughout.