Hi Peter, I have travelled extensively through Asia, Europe and N. America with my SBS-1 (and sometimes my RB) and it has never been a problem. Mostly I have the box itself in my carry-on (I know how suitcases get treated, I once had a part-time job as a baggage-handler when I was at uni) and the wires and stuff in my checked baggage. It has been queried only once in Sydney, but a brief and superficial explanation and I was on my way. Sometimes, if I have too much hand-luggage and do put it in my suitcase I try and put it in a small tin with some bubble-wrap in there. It keeps it warm and cozy! Well, maybe not, but it does protect its somewhat.
Happy travels!
PS Which hotel are you staying at in HK?