I have a 2g manifold that has been milled at Napa in Bursville, but he said its hard to get perfect. If I remember correctly #1 runner may have been a hair off, but with tightening it down and using this gasket, it never leaked. I do have a straight edge I could check for sure.
Awsome gasket
http://www.extremepsi.com/store/prod...cat=863&page=1
I even reused the gasket multiple times with copper spray. never leaked.