id reccomend a hks/jam one and dont worry mate il keep helping all i can till we get it sorted. I've been boosting very low for weeks on my gt since i bought it. I've changed the actuator, got a fmic replaced all the clips incase of leaks, took everypipe off the turbo system and checked for cracks etc then put them all back on, new filter and relocation kit pipes etc incase of leaks i cannot find it anywhere all that and its still not boosting right so i do know how you feel lol atleast i think weve sorted whats causing your problem so were halfway there already