ok guys got the hybrid off today, had a good look at it and there is nothing visibly wrong with it. the compressor wheel is in the exact same perfect condition as it was in before i put the turbo on and the exhaust side is perfect too, there is no shaft play what so ever and when it was on the car it wasnt smoking. what could be the problem here? could it be a bearing or somthing making the noise? it was boosting ok, then on full boost it would drop from .8 bar to around .5 and make the kind of noise youd expect if somthing was touching the turbine like a high pitched scraping whine, its really hard to explain. i really doubt its just a boost leak due to the kind of noise its making. i really dont know what to do i dont want to send the turbo away to be rebuilt if there is nothing wrong with it and be charged for nothing. any help will be really appreciated. im losing my mind!