I believe the dimensions and weights stated (in the case of the W54) are for the 'pits' only and not the other systems necessary for a full, working system as seen here.
https://en.wikipedia.org/wiki/W54#/m...iner_H-912.jpg
That's not particularly inconspicuous, is it? Don't fancy me chances of blagging one of them thru customs. And I see no Samsonite nor other garment carriage systems here, either
Best
Frank