Sounds like a right bodge up mate, no disrespect to yourself. Is it possible to get a picture, which might make it easier to understand?

This is my engine and pipe work:



Out the inlet manifold, T'd off, one to the ecu and T's off again behing the heater box for the boost gauge, and the other pipe runs straight to the DV.

I'm not using a bleed valve at the moment, standard boost. You say your DV ties in with the amal valve??????