WIEDU: How can I target specific opcodes for armor?

Hi,

I'm using WEIDU to redo some armor values.
Armor typically has 4 values for armor.
I'd like to target a specific value, instead of deleting all of them with one command.
Is this possible?


This is what I have -

COPY_EXISTING ~CHAN04.itm~ ~override~
LPF ~DELETE_ITEM_EQEFFECT~
INT_VAR
opcode_to_delete = 0 // armor bonus
END

How can I specify the above to only be the base armor bonus, or bonus vs piercing, etc. ?