If sharing this isn't ok for any reason (@ mod developer), please let me know and/or delete this! I understand the virtue behind it since for example "Why get this mod once you know how to change the stack sizes?". For me the reason is I had this mod from the start when I knew nothing of editing ini files back then and it is a good QOL mod. Most stack sizes are perfect and the slight weight reductions are neat. After playing many maps and wishing to customize more, and transfer more items quickly I can understand people's need to up some stack sizes a little without losing thousands of collected resources.

For those wishing to edit any stack size, for example up Metal by 50 or 100, or Wyvern milk by a little etc, you can go about it almost the same way as you'd change a non-modded item's stack size. The only little thing to target a remapped item from this mod is the item ending in _MyMod_C instead of the usual just _C

So for example:
ConfigOverrideItemMaxQuantity=(ItemClassString="PrimalItemResource_Metal_MyMod_C",Quantity=(MaxItemQuantity=300,bIgnoreMultiplier=true))

Empty line:
ConfigOverrideItemMaxQuantity=(ItemClassString="ITEM",Quantity=(MaxItemQuantity=NUMBER,bIgnoreMultiplier=true))


These lines should go in Game.INI right under the header [/script/shootergame.shootergamemode]

All vanilla item IDs can be found here:
https://ark.gamepedia.com/Item_IDs