Different costs for megastructures

[Abominus]

Greetings,

I just gone mad... how can I change the influence cost of only a specific megastructure?

I made an ascension perk and want habitats to be a bit cheaper:

habitat_0 = {
    entity = ""
    construction_entity = "habitat_phase_01_entity"
    portrait = "GFX_megastructure_construction_background"
    place_entity_on_planet_plane = yes
    entity_offset = { x = -7 y = -7 }
    build_time = 1800

    resources = {
        category = megastructures
        cost = {
            alloys = 1500
            influence = 150
        }
        cost = {
            trigger = {
                from = { has_ascension_perk = ap_plentiful_traditions_lebensraum_enlargement }
            }
            alloys = 1000
            influence = 100
        }
        cost = {
            trigger = {
                owner = { has_ascension_perk = ap_plentiful_traditions_lebensraum_enlargement }
            }
            alloys = 1001
            influence = 101
        }
    }

Nope, dont work so far. Not with from, not with owner, not with nothing at all (only has_ascension_perk etc.)
Is there any chance to change only the influence-costs for habitats?

 

[Abominus]

Found it out myself, 5 minutes after posting here... I just added a new category (economic_categories) and made megastructues as parent.