I read about this on VAF a while back. May be so, but in this realm, perhaps being conservative is safer, given the possible outcome? Would be interesting to see how the Barber Pole is driven in a Boeing. I think on King Airs I flew, it was strictly moved with pressure altitude. I am guessing both Beech and Boeing have done extensive instrumented testing to explore flutter limits to receive certification. I recall watching a YT vid of Airbus testing the A380 for flutter. A bit hairy. Hope to see both you guys at Reno again this year.