Okay, thanks for the explanation guys. Now I know, I though they were made of solid fiber carbon, that's all. I guess I'll stick to wood blades, I seem to be able to fly well with them and the heli seems to be stable enough for me, I like even the kind that are all plastic. A month or so ago I bought a set of plastic ones that are flexible and originally for a Blade CP, and after a few bang and kaboom here and there, they are still working fine and are not broke yet. - Maybe for "pros" out there they aren't good, but to me for the time being they work great and they have lasted me enough a few crashes and hitting something hard quite a few times already.

Regards