sorry to ask but what is so special about the AK cars?Track Inspection Cars, used by ARTC and others, probably the most widely travelled carriages in the country.
Their life is maybe limited, to be replaced by specialist vehicles.
I guess gunzels are intrigued about the AK cars, there's an air of mystery of what this train is all about; it has been explained in these pages a number of times, admittedly to varying degrees.
The train is also set up to perform an inspection function for management jaunts, hence the big windows and seating areas at each end of the train, think observation car.
In the early days the middle car was just a (recoded) FAM sleeper, the recording could function without it; that may have changed.
Mikesyd, While the train was in StateRail, etc. ownership, both hardware and software were frequently upgraded and improved to be the best they could be. Since ARTC ownership, ??? However, knowing how passionate track recording people are about what they do, I'm sure the current people would be still be wanting it to be the best it can be, within budget constraints of course.
How long will they keep rolling, who knows?