I'm with Jack on that one.

I've got a couple of profiles with Saitos in them and they've stood up just fine to the rather incredible shaking they get.

The Mojo is so strong it'll withstand being lawn-darted straight in from over 200 feet -- yes, I've done it :-) All it needed was a little balsa and film where the battery came through the leading edge of the wing. absolutely zero other damage. Try that with a Katana 46 or Katana 70 :-)

If the poster's planes are breaking up then he's buynig/flying the wrong designs :-)