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you get metals/materials(salvage) to add to a weapon to change it\'s arrtibutes, i have been playing MMORPG\'s FOR a ong time and with a bunch of weapons that are the same get\'s boring after a while so if it had say a workmanship/craftmanship of say 5 that means you could tinker it 5 more times until it\'s exellent craft 10, and depending on which salvage you add depends on which attribute it alters... it will also add a better economic system and make the game more interesting