OK, well if you will look at what you are agreeing with, you will see, it proves you are wrong.. Get out your calculator for a second here..... .006 milled off the head reduces the chamber volume aprox 1 CC. Therfore, removing the .040 you claim, would reduce the chamber volume aprox 6.6 CC..... reducing the chamber by 6.6 cc, increases the ratio by .73, as in 10.22 to 10.95 (example ratio) how is your 7:1 motor gonna become 10 or 11:1 by milling .040?