Flycutting cast pistons.

I've fly cut cast pistons before; so far have not had a problem. The build was a 318, cast rebuilder Sealed Power pistons .055 down in the hole, 360 heads angle milled to 45.5 cc, cam was a custom solid from a local circle track racer with .525 lift Int, .556 lift Exh, 248, 252 degrees duration at .050 lift. I run it like I stole it!!