I have been lucky enough to fly on several different continents, always taking my flight bag on the scheduled flight out and back. Never once have I had a problem with anything, except................................ my headset. Screeners just don't seem to like the look of it on screen. I have taken to putting it through separate to avoid messing up my bag. ICOM, GPS etc no problem.
On a related note, I am typing this from a departure lounge and also in my bag is the strainer with screw driver attached!
The Wombat