Was just installing a video transmitter on a mates Phantom with him. He had prop guards on and tried fitting the FPV himself but gave up and brought it over. We were putting it back together and he had forgot to bring the prop guards with him so we assembled it without them. He forgot to mention that the prop guards came with longer screws. As you can probably tell by now we screwed in the long screws and screwed them right into the motors! All 4 of them ruined.