MATERIALS
        self.components = COMPONENTS
        self.components = dict()

        for name, layers in COMPONENTS.items():
            parts = []
            for material, thickness in layers:
                if material == &#39;solarblack&#39;:
                    material = self.solarblack
                mass_frac, den = MATERIALS[material]
                if material == &#39;al&#39;:
                    thickness = thickness * 0.8
                parts.append(
                    self.create_mater