Thanks man, i'm holding around 0.5/0.6 bar of vacuum while idling and driving easy. If I had a leak I'd imagine i'd have significantly less vacuum ? I sprayed ignition fluid around the intake and injectors, usually if there's a leak there the revs would jump significantly as the ignition fluid get sucked in but it had no effect. My spec is completely standard on the engine. Top mount intercooler, standard actuator, apexi dump-valve. I had a re-circulating valve in the car when the idle went up, and I put the bov in thinking it might help, but it made no difference.