I have now decided, that the stock turbo is not going to stay on my plane for the rev-2 cowl.  The wastegate sucks, and turbo just isn't high enough quality.  It's one thing to run around in a car with cracked parts, but not in the plane.  

 

I'm going to look into an aftermarket turbo.  This one would be properly sized, have a stainless exhaust manifold, and usable wastegate.  Why do I do these things to myself...   (my kingdom for a turbo that isn't cracked!)