I am having difficulty piercing for .098 pilot holes without having delamination occur. Also with a fabric-silicone wrapped, aluminum insert material. The phenolic material has a thickness of .125. The alum insert has a thickness of .09, with an overall thickness of .150. We use a Paser 4 nozzle on a Mach3 machine with vac-assist on a 90 hp intensifier.

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