No no no no no

Look at how the DUMPVALVE Is plumbed in after the 2nd intercooler...

When its open the air flows back to the pipe BEFORE the turbo, ie the filter to turbo pipe, JUST like on all factory DV's (inc cossies!) and any aftermarket recirc setup...

And what happens when these setups get stuck open for some reason or other? Yup! No Boost! So its not anything but a DV, hence why its vented to atmo, as it makes no bloody difference as its just a BOV, lol

The valve bypassing the s/c seems valid tho. Does it "switch off" the supercharger using an electromagnetic clutch or does the supercharger always run too, and the bypass valve around it just open to minimise restriction?

ROFL@AssTissueIssue And yes, Sweeden is lovely, you have Sweedish women there