** Since improving a {{EquipmentLink|Combat Ration}} up to +6★ cost '''0''' screw, it is possible to farm some screw by upgrading a ration once a day while doing quest [[Quests#F18|F18]]. | ** Since improving a {{EquipmentLink|Combat Ration}} up to +6★ cost '''0''' screw, it is possible to farm some screw by upgrading a ration once a day while doing quest [[Quests#F18|F18]]. |