Just an option in setup, like we have for combat trim now......
when enabled flaps autoretract just like now.
when disabled flaps can go 25mph overspeed with stress, 50mph with stutter and above that the flap is damaged and jams (or breaks off, depending on aircraft's ability to take damage).......
some planes like the spit dont really need flaps, but im sick and tired of dying in my P38 cause the damn flaps wont stay out.