Im starting to think its to do with the tuner, he didnt take very long, most of it was done within an hour, on the graph its only holding 16psi and you'd think he would of said, "mate, there only mild cams, you got some issues with leaks somwhere", it even stalled on him on the drive home, i think fix up this leak and possibly change the wastgate spring for a 1bar spring and even replace the resonator and then retune with E85.