‘97 12 valve. I had my head milled .018” 6 years ago. I was running my 5x.013 sac injectors with the thin .5mm washers with good results. I had to remove my head to fix a weeping head gasket. My machinist cut it another .004”. Would I be ok to run the thin washers again? Or would it be good insurance to move up to the medium thickness ones? I’m using a standard thickness head gasket too. My block has not been touched. Right now I’m at 19* timing. I might advance it a little in the future. Thanks!