It's worth taking the hoses off and inspecting them.

.

.some of mine were splitting and de-laminating, but you couldn't see that untill you had them in your hands and squished them up a bit.

.

.particularly the hard to get to one at the back of the IC as it's right over the downpipe.

.

.after replacing all the hoses and clips

(stainless jubes are about

£1.50 each and

£8 for 250mm of silicone hose).

.

.I sealed all the joints with a smear of high temp silicone.

.

.made a big difference on and off boost, bov is more active and responsive.

.

.all in for

£20.

As yours is rev2, I would also remove and inspect the AFM, which also gives you the opportunity to check the turbo and have a sketch around that part of the engine.
