Pneumatic tube update

In response to the Pneumatically Prague post, readers TK and DS sent along this link with more info on the system, including this impossibly-cool photo of the control system…

… and this description of what sounds like a really fun technological show-down between pneumatic tube, messenger and telex system:

There was an experiment in about 1970 in which they tried to deliver 50 telegram forms (it is the maximum capacity of the capsule) from the Prague main post office to the Prague castle post office by the messenger, by telex system (with the fastest operator – winner of the typewriter competitions), and by the pneumatic tube system. The tube system was the absolute winner, taking 8 minutes to deliver the package.

If you could apply advertising trends from 30 years later to promote the tube, it would have been fun to print t-shirts that read Got Pneu?