All you Antarctica veterans can probably help me with this one. The Aerolineas carry-on baggage allowance between Bueno Aires and Ushuaia is 11lbs / 5 Kg - which is not very much. How tightly is this weight restriction enforced? Are they weighing all carry-on bags at check in? Also, what kind of aircraft do they use on that route (always good to know)? Thanks in advance.