I have recently fitted quick release prop guards from besemusa. I have had two situations where they have saved prop damage and maybe more. From a safety standpoint they seem to make a lot of sense. The quick release mechanism is exactly that, quick, and the drone fits the box with the modified mount points just fine. The only downside is they are visible in shot but they can be eliminated by introducing a slight tilt in the cam. They seem like a bit of a no brainier for the money.