switch (FEAT_TRAINS, SELF, capacity, position_in_vehid_chain % 3) {
    1: 33;
    return 0; }

switch (FEAT_TRAINS, SELF, arti_88, extra_callback_info1) {
    1..2: item_test_88;
    CB_RESULT_NO_MORE_ARTICULATED_PARTS; }

item (FEAT_TRAINS, item_test_88) {
    property {
        sprite_id: SPRITE_ID_NEW_TRAIN;
        misc_flags: bitmask(TRAIN_FLAG_FLIP);
        name: string(TEST_88);
        climates_available: ALL_CLIMATES;
        introduction_date: date(0, 1, 1);
        speed: 100km/h;
        power: 1000 hpM;
        weight: 50 ton;
        tractive_effort_coefficient: 0.3;
        length: 8;
        refittable_cargo_classes: bitmask(CC_PASSENGERS);
        cargo_capacity: 1;
    }
    graphics {
        articulated_part: arti_88;
        default: spr_8_def;
        cargo_capacity: capacity;
    }
}

switch (FEAT_TRAINS, SELF, arti_99, extra_callback_info1) {
    1..2: item_test_99;
    CB_RESULT_NO_MORE_ARTICULATED_PARTS; }

item (FEAT_TRAINS, item_test_99) {
    property {
        sprite_id: SPRITE_ID_NEW_TRAIN;
        misc_flags: bitmask(TRAIN_FLAG_FLIP);
        name: string(TEST_88);
        climates_available: ALL_CLIMATES;
        introduction_date: date(0, 1, 1);
        speed: 100km/h;
        power: 1000 hpM;
        weight: 50 ton;
        tractive_effort_coefficient: 0.3;
        length: 8;
        refittable_cargo_classes: bitmask(CC_PASSENGERS);
        cargo_capacity: 1;
    }
    graphics {
        articulated_part: arti_99;
        default: spr_8_def;
        cargo_capacity: capacity;
        purchase_cargo_capacity: 33;
    }
}