In the Iron Islands, do you think that the various ship captains owe any feudal obligation to the lords, or are they more like sell-sails who have to follow the rules laid down by the lords if they wish to use the isles as a home port? When Balon calls the longships home, do they make a verbal agreement to sail under the Greyjoy flag/command? How did the Vikings operate in real life (if that is a good comparison)? Thanks for the effort.