Use a table ban saw to hack off the 340 piston crown .

It's been over a month, did the band saw blade get dull? Sandpaper lose it's grit? chewing gum soften up from heat?
Good question, I been traveling, but the saw and a bunch of other stuff should be waiting for me when I get home...you should see that band saw, it's a beautiful compact unit , where you just bring the blade / motor unit straight down, (it's swings down on a precision hing and cuts anything just the way you grip it in the vise, so a pistons crown will meet the blade, straight or crooked, depends on me how / where I clamp it. I will be home next week.