I had problems with "flutter" on my Nexstar. Seeing this thread gave me ideas to check out. I found that the push rods had "wobbled out" the holes in the servo control horn. ( This wing has seen a few crashes.) The rods into the airlerons were still nice and tight. I moved the control rods in one hole on the control horn, and will check out my work the next time I fly. The controls are tight again, so hopefully the problem is cured.

Art
AMA 915882