The Round Robin Boxcar was a fantastic and original concept, and personally I think it should remain as such.
I understand that the boxcar didn't get everywhere and it is disappointing to miss out, but it was a monumental task to send it to as many lines as possible around the globe, and essentially there would always be one or two that it wouldn't get to.
But..
If you get another one and start again, where do you stop? If some railways missed out on the first one, and subsequently miss out on the second too, do we start a third?
The original idea was both unique and brilliant, and thanks to the members of this great forum, superbly executed. If we start again the idea is no longer original or unique. Remember the Ice Bucket Challenge? The original idea was great, but by the 10th or 11th viewing of yet another person trying to put their unique spin on how to throw iced water over themselves, it all became a bit dull.
Perhaps I'm just a sentimental old sod (or a miserable git

), but I think there has to come a time whereby the Box car is finally returned to it's originator and becomes part of the history and legacy of GSC.
Crikey, just gone back through this thread from post #1. Wasn't it nice and clean when it started out.