Raising blockdamage of stone axe

[Zolokhan]

this sounds easy but I am unable to only add to the base blockdamage of the stone axe ... 

<set xpath="/items/item[@name='meleeToolRepairT0StoneAxe']/effect_group[@name='meleeToolRepairT0StoneAxe']/passive_effect[@name='BlockDamage']/@value">30</set>

causes all instances of blockdamage to 30 so it scales into the 900+ damage because of the tiers.  How to i only impact the Blockdamage base_set value and not the perc_add values?

 

[BFT2020]

Do this

<set xpath="/items/item[@name='meleeToolRepairT0StoneAxe']/effect_group/passive_effect[@name='BlockDamage' and @operation='base_set']/@value">30</set>

 

[Zolokhan]

AAHH .... 'and' ... thank you !