I've also witnessed the weakness of the Synergy's elevator... here's a buddy of mine's (Hammbone's). He managed to get it down safely. He was using the quality servos (8411's) with very stong and stiff linkages. We think it broke during a snapping maneuver.

Mine hasn't shown any signs of wear yet. However, I did get an up close look at the rudder structure and beefed that up a bit as I thought the balsa was a little weak in some spots.