Hi opjose
There are different view points on this. If my model can work OK with Nyrods I tend to use them. In a crash the Nyrod tends to put a smaller load on the servo than a wood or carbob fiber rod because the inner Nyrod rod weighs a lot less than the wood or carbon fiber rod. No need to get excited here. It is a minor point. I have stripped a number of servos thru the years and have studied what is causing that and if there is a way to reduce this. Because of my training, education, and career I happen to be comfortable thinking about the differences in the inertia of the two methods. I think I may have made some improvements in some of my models because of this. Others don't. I'm happy either way. Most people are not comfortable thinking of inertia in a dynamic situation such as a crash. The planes will fly either way. It has little importance and need not be considered. I do.