ok, first of all that Stock bov is completely set up wrong Im affraid, should look like this

(click the pic to make it bigger, might have to click it again to make it even bigger)

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As you can see you are also missing the little VTV Valve

/ filter, this is needed for the stock valve to work

Since the car has had an MBC fitted it would have been fitted between the Turbo and Actuator pipe and them 2 unblocked pipes should have been blocked.

Are you planning on putting the MBC back on or running stock boost?