Incorporating thermoplastic welding across predetermined plurality of flanges, wherein the flanges are operably adapted to meet predetermined best practice weld angles and meet best practice panel loading angle(s). The added flanges may require special tool action such as lifters, and may not be molded with just the core and cavity of the mold. The flanges are suitably strong enough to support the pressures needed for welding, even through non-direct contact. There is operably provided part environments that allow for plastic welding in at least one predetermined area where needed, or at least one predetermined continuous weld as needed, and eliminates the difficult welding or non-weldable areas.