Wood is considered to be natures composite. Until a few years ago, all flyers were using wood and the best of them were flying just as hard as they do know with graphite blades. I have been flying a Raptor 30 all summer with wood blades, it is constantly being flipped a flopped in all directions. As long as you keep the head speed under 2000, I don't think you can do anything that will cause any undue stress on the stock wood blades, short of expecting them to beat the earth out of the way. The wood in the Raptor blades looks to be no worse than the wood I've seen in hundreds of other blades over the years, and far better than I've seen in some. The reason the most fliers recommend the stock wood blades to beginners is because they are cheap to replace, but they will take most beginners far beyond a hover, into death spirols, rolling tail slides and other such silliness, and come back for more.