Need help writing MM patch.

[Kerbals_of_Steel]

Trying my hand writing a MM patch to add stock cargo capacity to two parts from Suicidal Insanity's Project Orion mod. Here is the patch as written:

Spoiler

@PART[SPO_CrewSpine_Short]
{
    MODULE
    {
        name = ModuleInventoryPart        
        InventorySlots = 12
        packedVolumeLimit = 1500
    }
}            

@PART[SPO_375mHab]
{
    MODULE
    {
        name = ModuleInventoryPart        
        InventorySlots = 24
        packedVolumeLimit = 5000
    }
}

It works, but TOO well. For some reason it adds two stock inventories to each part, each with the listed specs (12 slots/1500L for the small one, 24 slots/5000L for the larger.) Each one works fine, loading and unloading parts independently Pic:

Now I could work around it just by halving the specs, but I can't figure out why it is giving me two separate inventories in the first place. I'm really new at writing MM patches, so please ELI5.

KoS

Edited May 15, 2021 by Kerbals_of_Steel

[Guest]

I can only think it’s linked to the crew seats ie 2 seats so adds it twice thinking it’s seat inventory? Does the MM log throw anything up? (In main KSP folder/patches/ModuleManager).

[OHara]

In Module Manager syntax (link) writing  MODULE { ... } will insert a new  module in the configuration.

To change an existing configuration, usually you want the @ or 'at' operator, and the name of the module in square brackets.  The % operator, like @, says to make a change but % will also add the entry if it is not already in the configuration.

    @MODULE[ModuleInventoryPart] {
        %InventorySlots = 12
        %packedVolumeLimit = 1500
    }

Edited May 17, 2021 by OHara
better link