Hi faced similar issue two days before the European Championship in 2008 please see this thread:

[link]http://www.gbrcaa.org/smf/index.php?topic=1335.0[/link]http://www.gbrcaa.org/smf/index.php?topic=1335.0

I made some comments about the strength of the plane in CARF Integral Kinda Build Thread but I received no answers from the reps. I am 100% that my case was a structural failure.

If you have some spare time please see the video of the repaired Integral this is the way I used to land the plane, only once I had a dead stick and the landing was a bit more heavier and that cost me a fuselage.

Anyway now is fixed and of course I fly the plane as a B model.

Regards,
Nikos