Wow!I do not travel with my regulator in hand carry, because I think it’s fragile- I do it because it’s damn expensive and my insurance will not cover if suitcase got lost.
In my carry on I always have: regulator, mask, dive computers, swim suit and small toiletries (this way we can still dive, even if the rest don’t show)
What kind of travel insurance does not cover lost of checked bag? How about damage during the transit? Do they rely on the airline or your own personal insurance, house hold, to compensate for that?
Your insurance also does not cover Sipadan if my memory is correct.