nothin is instant.. But that file you posted is some pretty good proof. Look at the MSV, and thats only a .038 squish. I'm by no means a expert on dome design. When squish gets tighter.. your MSV increases along wit heat. So if you mill the stock head with out rechambering.. the MSV COULD (depending how much was taking off) be too high and cause deto and lead to piston failure. Now.. you can run a tighter squish if the band and angle have been adjusted to compensate. But were not talking a rechambered dome.. we're taling a stock dome design with increased compression.. Some dome designs are more prone to engine failure then others.. Some can get by bandaiding the problem. Orcourse at the exspense of HP. Again.. i'm no expert but.. take it for what it is.. My opinion.