similar to the "one item of hand baggage" I guess. I could take 4 small bags totalling the same space as my pull-along-case...but look at the mess that would cause at security, even though I'd be self loading at the plane, and no greater weight. Hold bags also get screened I believe.

Anyway, it's not just loading/tracking your extra bag....it's sending it on to your home when it's decided to go on a different journey to the one you planned

Drink some more glogg and it'll all make sense!