Why would you want to make a Harvard sound any different? How else could we have kept the good citizens of Moose Jaw awake at night, or get the attention of the blonde girl driving the combine? The Harvard sounds just the way God meant an aircraft to sound, now of course we have our Air Cadet L19s modified so they dont disturb the Nimbys, I gues they would rather have kids hanging around shopping malls than making noise with airplanes! {Now I feel much better!}