Update:
Took it to the phirm today - good bunch of lads and really helpful!
Found that the turbo outlet piped was hanging off! The forge pipe looks like it was cut just a little too short!
Luckily my bro replaced his mk4 engine not too long ago so I stole his pipe.
It must has been placed on there wrong in the first place as I'm now getting 21 psi as apposed to 20.
They also advised me to change the forge splitter valve to the forge 007... Whorls everyone else agree?
Cheers