in for exemple
\game\data\stats\items\98400-98499.xml
find your quest item that does not stack and add this <set name="is_stackable" val="true" />
you can also edit <set name="is_destroyable" val="true" />
XML:
<item id="98464" name="Herb Roots" type="EtcItem">
<!-- A somewhat useless ingredient, but dried and ground, these roots can be used to concoct a potion for a dangerous situation. Take it to a person who is looking for Herb Roots. -->
<set name="icon" val="icon.etc_ginseng_gray_i00" />
<set name="default_action" val="NONE" />
<set name="immediate_effect" val="true" />
<set name="material" val="STEEL" />
<set name="is_tradable" val="false" />
<set name="is_dropable" val="false" />
<set name="is_destroyable" val="true" />
<set name="is_depositable" val="false" />
<set name="is_sellable" val="false" />
<set name="is_stackable" val="true" />
</item>
<item id="98466" name="Stolen Burial Item" type="EtcItem">
<!-- An item that is usually buried with its owner. It looks very valuable, so its owner must have been quite wealthy. -->
<set name="icon" val="icon.ect_charm_of_protection_i00" />
<set name="default_action" val="NONE" />
<set name="immediate_effect" val="true" />
<set name="material" val="STEEL" />
<set name="is_tradable" val="false" />
<set name="is_dropable" val="false" />
<set name="is_destroyable" val="true" />
<set name="is_depositable" val="false" />
<set name="is_sellable" val="false" />
<set name="is_stackable" val="true" />
</item>
<item id="98467" name="Old Poison" type="EtcItem">
<!-- A vial with traces of poison. It seems to have been used by Elmore during its war with Aden. Those who died from it turned into undead. -->
<set name="icon" val="icon.collection_boss_rune_lv10" />
<set name="default_action" val="NONE" />
<set name="immediate_effect" val="true" />
<set name="material" val="STEEL" />
<set name="is_tradable" val="false" />
<set name="is_dropable" val="false" />
<set name="is_destroyable" val="true" />
<set name="is_depositable" val="false" />
<set name="is_sellable" val="false" />
<set name="is_stackable" val="true" />
</item>
this has also been said in 98500-98599.xml :
XML:
<item id="98516" name="+4 B-grade Light Armor Set Box" additionalName="Sealed" type="EtcItem">
<!-- Double-click to obtain various items. -->
<set name="icon" val="icon.etc_box_of_adventure_3_i00" />
<set name="default_action" val="PEEL" />
<set name="immediate_effect" val="true" />
<set name="material" val="STEEL" />
<set name="is_tradable" val="false" />
<set name="is_dropable" val="false" />
<set name="is_sellable" val="false" />
<set name="is_stackable" val="true" />
<set name="handler" val="ExtractableItems" />
<capsuled_items>
<item id="93511" min="1" max="1" minEnchant="4" maxEnchant="4" chance="100" /> <!-- Blue Wolf Leather Armor - Sealed -->
<item id="93527" min="1" max="1" minEnchant="4" maxEnchant="4" chance="100" /> <!-- Blue Wolf Gloves (Light) - Sealed -->
<item id="93539" min="1" max="1" minEnchant="4" maxEnchant="4" chance="100" /> <!-- Blue Wolf Boots (Light) - Sealed -->
<item id="93551" min="1" max="1" minEnchant="4" maxEnchant="4" chance="100" /> <!-- Blue Wolf Helmet (Light) - Sealed -->
</capsuled_items>
</item>
Find your item with : L2J_Mobius_Essence_7.0_Assassin\game\data\stats\items\search.cmd
For A-garde Light Armor Coupon - Upper
add this in a 10069.xml file
...\game\data\multisell\10069.xml
XML:
<?xml version="1.0" encoding="UTF-8"?>
<list xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../xsd/multisell.xsd">
<npcs>
<npc>-1</npc> <!-- Everywhere -->
</npcs>
<item>
<ingredient id="98507" count="1" /> <!-- A-grade Light Armor Coupon - Upper -->
<production id="92265" count="1" /> <!-- Tallum Leather Armor - Sealed -->
</item>
<item>
<ingredient id="98507" count="1" /> <!-- A-grade Light Armor Coupon - Upper -->
<production id="92266" count="1" /> <!-- Leather Armor of Nightmare - Sealed -->
</item>
<item>
<ingredient id="98507" count="1" /> <!-- A-grade Light Armor Coupon - Upper -->
<production id="92263" count="1" /> <!-- Dark Crystal Leather Armor - Sealed -->
</item>
<item>
<ingredient id="98507" count="1" /> <!-- A-grade Light Armor Coupon - Upper -->
<production id="92267" count="1" /> <!-- Majestic Leather Armor - Sealed -->
</item>
</list>
you have the basis for your other coupons, read the server error messages carefully.
for leather coupons we have the following lists 10069.xml to 10072.xml
A-garde Light Armor Coupon - Upper --> 10069.xml
A-garde Light Armor Coupon - Gloves --> 10070.xml
A-garde Light Armor Coupon - Boots --> 10071.xml
A-garde Light Armor Coupon - Helmet --> 10072.xml
for exemple:
the game assistant can help you find the items in question.
and with \game\data\stats\items\search.cmd