I've only ever connected TG-TG for domestic-international at BKK, onward boarding pass in hand, clearing passport control at the domestic airport. So for the first time I'll be doing PG-CX on separate tickets, USM-BKK-HKG. It shouldn't be a problem to through-check luggage and I believe as an onward international passenger I should be able to clear immigration at USM, though on a separate ticket PG will not be able to print my onward BKK-HKG boarding pass (and I don't think they can print CX boarding passes in any case). Not 100% sure I'll be able to check in online for my CX flights which were booked with BA miles, and from my resort it might be a pain to do so in any case. Should I have any problem being treated as an international departing passenger at USM? Assume there's a transfer desk where I'll clear security to move from the domestic to international pier, where I can pick up my CX boarding pass? Ultimately the question is whether I'll be able to avoid going out into the departures hall at BKK, checking in with CX, and clearing immigration at BKK. Not a huge deal if I had to do that, but looking for what to expect. Thanks for any insight!