I recently purchase blade guards for my Vision 2 - I had already burned through about 3 props, before I thought this can't be a bad idea. Usually my props where getting smoked on engine shut down... Usually craft came down fine, everything perfect, but when I went to shut it down, it would usually wind up to higher rpm and take of sideways.. destroying a prop or two. So on my first order of props, I thought I would order the guards. I ordered a set, launched a test flight. Seemed they where alittle close for comfort.. but what could I do? No directions by the way putting them on. (Anyone know what the string is for? So maybe I screwed up the install?? Don't know. However, at about 168' yesterday the props started to grind into the guards and quad went into a struggle for it's life.. it really fought hard too.. but came baring down to the ground.. upside down. landed in about 4 inches of snow.. "thank God!" Saved it's life.. all props where smoked and guards just shattered. I put on new props and gave it a test flight right away... Everything is ok! Praise God! No video was not going.. It happened to be a full card.