Sorry for the delay, but I have finally managed to extract my flight information from my trusty handwritten log in order to offer some more data points:-
16.04.93 BKK HKG QF78
07.01.95 HKG BKK QF77
30.03.97 BKK HKG QF78
05.04.97 HKG BKK QF77
28.06.97 BKK HKG QF78
03.07.97 HKG BKK QF77
21.01.98 HKG BKK QF85
04.07.98 SIN HKG QF77
Those of a geeky bent will quickly spot the significance of the last flight in the list. Quite fitting, therefore, that it should also have been the last time that I did one of these intra-Asia flights. The JSA has since taken better care of that need.