Bleeder Valve and holding boost problems

[Sleeper R33]

I have relocated the bleeder valve reading location were it pickes up the pressure to the pipe between the std BOV and the manifold (this was a recomendation from my mechanic when i fitted the FMIC) but i seem to be loosing way too much boost. Previously it was tapped into the intercooler pipe just before it reaches the manifold. Obviously this is getting different readings, anybody got any suggestions on the best location.

Also is there any other areas i should look at to determine were i am loosing boost, it reaches around 13-14psi and is bleeding back to around 9-10 at 6rmp.

Thanks for any suggestions.