Well I finally got my taste of flutter last nite. I was doing a very high speed pass ... there it was. Wings shook violently. One of the control arms completely ripped off, the other bent almost in half. I managed to land it without a problem with just elevator and rudder. Not a very good high speed plane .... I believe it was traveling at 90+ MPH when it happened. I haven't assessed all the damage yet, but I hear some little piece of balsa moving around in the wing. After all I have put this plane through, it still is the most forgiving plane I have ever flown. I think true-heartedly I was trying to find it's breaking point.