False! Two examples: For example, weight advantages are often expressed in terms of castings – but this information does not take into account the weight of the adapter discs required to adapt standardised castings to the approximately 200 different excavator style dimensions. OilQuick quick couplers are intentionally welded in order to adapt each quick coupler to each specific attachment with millimetre precision. We weighed things again: The bottom line is that there is no weight advantage from castings. Even currently marketed increases in the cross-section in the quick-coupler coupling do not physically lead to higher oil flow rates – quite the opposite: Larger cross-sections on the coupling inlet can have a negative effect on flow conditions, as the resistance in the coupling increases due to the same cross-section on the coupling outlet.