just make the flaps rip out when 100mph above their safe speed , and make them buffet the plane severely between their safe speed and the 100mph over the safe speed rip-out limit.
All I know is for the P-38 this fairy feature is killing it, as it is the ONLY plane in the entire set that relies on its flaps exclusively for survival, and when you have your flaps retract on you while you're pulling hard (and flaps out MEANS the 38 is turning, and HARD) on the stick, flap retracts and the 38 will either spin or it will cause you to lose angles and gets you killed. And all because the stupid flap retracted when you went 1 mph above the limit even though you were pulling so hard the speed went down 80mph below the retract speed less than half a second later.