Originally Posted by
imnewhere
thanks. I guess the issue is also security check is at the gate. So in case security doesn't let me take it onboard, I have no way of going back to check in counter to check it...
Yes, you can. Security is before immigration. If you are stopped at the security, you can still get back to the check-in counters and see if they can give you an exception tag (I don't know if they will provide one to a SL), or check the monitor as luggage.