thank you P3 for the quick response
Since I posted the situation has evolved a bit more..... after researching / realizing these shortcoming of the MBC i wanted to try and reduce all the damage via oversboosting I could by completely loosening the MBC to reduce boost as much as possible before being able to switch to another setup ( hybrid etc ) and for some reason the boost is still just as high as when it was about 2 full rotations tighter.
is it possible that the tial 38mm just can't flow enough for the setup ( catless FP green ) since basically the MBC is turned completely down? I say this because the boost will taper back down to about 1.5 barr ( where it should be)
thanks again for your time and input, it is greatly appreciated