Cura/resources/extruders/elegoo_neptune2D_extruder_0.def.json

{
    "version": 2,
    "name": "Extruder 1",
    "inherits": "fdmextruder",
    "metadata": {
        "machine": "elegoo_neptune_2D",
        "position": "0"
    },

    "overrides": {
        "extruder_nr": { "default_value": 0 },
        "machine_nozzle_size": { "default_value": 0.4 },
        "material_diameter": { "default_value": 1.75 },
		"machine_extruder_start_code": {"default_value": "G1 F1200 E80\nG92 E0"},
        "machine_extruder_end_code": {"default_value": "G1 F1600 E-80\nG92 E0"}
    }
}