[David]

My understanding of the squish is that it should be the tightest right at the cylinder wall. This forces the mixture to the center of the chamber. If you don't need more chamfer to achieve this than the 1mm gasket should be fine. It sounds like you should have a 1mm gasket from the machining anyway. If you need gaskets, EBS sells the 1mm ones. FYI, I used K&W copper coat on my base gaskets per recommendations on this forum.