Changing stack sizes

[NextgenFury]

Hello hello , NextGenFury here.

I considered making myself a stacksize mod, due to i was unable to find a mod as i wanted.

After a bit research i found out :
TUNING.STACK_SIZE_SMALLITEM = 60
TUNING.STACK_SIZE_MEDITEM = 60
TUNING.STACK_SIZE_LARGEITEM = 60
So with this lua file, i can make the mod work , but the tricky part ,

So let's say that  i want to make the max Berry Bush stack 20 specificly , can i or how i do it?
When i was testing with boards , i tried adding   
TUNING.STACK_SIZE_BOARDS=40
TUNING.STACK_SIZE_PAPYRUS=40
Which didn't seem to work.

 

Thanks for reading,
Fury.

[NextgenFury]

So i checked files a bit and noticed files determine stack sizes by item type, such as smallitem.

Would it be safe / bug free if i create a new item type for those items? And would it break the game if the mod gets removed?

[zUsername]

local function MoreStack(inst)
	if not TheWorld.ismastersim then
    	return inst
    end
	if inst.components.stackable then
		inst.components.stackable.maxsize = 20
	end
end

AddPrefabPostInit("berrybush", MoreStack)
AddPrefabPostInit("berrybush2", MoreStack)
AddPrefabPostInit("berrybush_juicy", MoreStack)