Patrick

I also observed that Hammbone's tail failure is untypical for the problems we had on a few kits. If there was anything to break it was the stab, not the elevator.

The actual version of the Synergy has a plain balsa stab with modified elevators with some additional triangle reinforcements at the exposed areas.

The problem we had with the tail of the synergy occurred because the quality of the balsa wood was sometimes way under specification. We always ordered 100 Gr. Balsa, but did receive sometimes 70 Gr. quality (this is for the weight basically good, but not for the stability of the construction).

I fly a kit of the very, very first batch - I never had problems, but I a) braced the tail with 2 mm carbon b) reinforced the linkage with carbon tube around the steel linkage and last but not least use top of the range servos with aluminum arms. There is NO play at all on the tail.

Rgds
Alvin