Same here! I´ve tried every possible setting, played around with my whole configuration, updated drivers etc. I still see those microstutters every couple of seconds that go away again only to return again. Nothing seems to have an effect.
After weeks of messing around I guess I´ll have to accept the stutters for now. My system is not reaching its limits as far as I can tell. When the stutters are gone (about 80 percent of the time), it´s a pleasure to fly with the Aero.