This may sound a bit ridiculous to you guys but what is this incidence that your speaking about and how do i go about checking and changing it.

I also purchased a H9 EDGE 540 and was going with the ZDZ 40 to power it being that I'm a nut for 3d aerobatics, but I'm not to knowledgeable about building these arfs and finding out what to do as far as strengthening them.