one thing ian that skeered me about a month ago that ive never seen mentioned here and i searched for it for about a week is every time i would start practiceing my hovering or any type of hard pulling i would get this WIERD NOISE also, and it turned out to be just a small area of my canopy had came unglued and was vibrating a scary noise under the right load so the moral to the story is it might not always be mechanical so look for loose anything!!