Take a spare or two setup
drain/empty tanks, completely if possible
place the tanks/setup kits in a plastic bag (sandwich bag is ideal)
They will leak at 30,000ft pressurised cabin so contain any greasy leaks
I chucked half a dozen 10ml juice bottles in case in a plastic sandwich bag
(this is how I travelled in the past)
The batteries though HAVE to be put in carry on bag on plane with you
with laptops & vape stuff - batteries mostly brought out on a separate tray for inspection at X-ray m/c
All tanks should go in a sandwich bag, all together or in their own bag etc...
They just need to scan the various devices to ensure they are what they are etc...
Once done shove it all back in your carry on or about yourself after clearing security
You should be fine unless O'Leary thinks you follow a certain ideology & carry an Innokin CoolFire 2
yeah maybe not wise to take this kit through the airport...
I got a slightly odd look taking a camo Innokin Adept through, but all OK
though reckon I would have received a full strip search with a CF2 kit