Hi!
I've flown from (and to) Israel twice so far with my rig.
Once to Italy via Moscow (with Aeroflot), and once to Czech Republic (don't remember which airline).
I took my rig with me on the plane both times (with Cypres, without the hook knife), and had no issues with it.
I always carry the Cypres x-ray card with me, just in case :)
Also, I used a RigSleeve the last time, which makes the rig slightly less conspicuous when carrying around, though it obviously does nothing with x-ray scans.