Here's a picture regarding the routing. A 13psi wastegate spring will be good enough. As far as re-arranging the 2 wires in the ECU and doing single-bank fueling along to wrap up the Mac process, go on YouTube and look up CD919's boost control tutorial. Lastly, use any video you find helpful regarding how do do single-bank fueling for an N54 so you know exactly what to do with your O2 sensor placement. That should be it.