Flak 2.0 will not work...as per IH and Chris Hardaway. I bough a bunch of them to have cut...can't be done. Maybe the non polarized versions, but too much twisting is involved. IH and @Chris A Hardaway can give you more specifics.
Ya, I was totally disappointed when I realized the flak 2.0 polars wouldn't work for Juliet/XX cuts. There is that giant notch cut out on the nasal side, cutting (no pun intended) the usable area Way down!