thats when you start spraying PTFE grease in your charger instead. those twin inlets look damn good.. saw a couple in the flesh at the rallye show.. im keeping my boost return though, tried and tested.. still going strong after 17 years 
Yeah, I agree, for the sake of the few bhp difference it would make, i really can't be bothered to remember to take off the charger inlet hose and spray stuff in there.
plus i don't like the noise of the boost dumping to atmosphere.