Or, like me, you could change to airmaster screw on props for their p4pv2. Just make sure you loctite the screws on the replacement adapters. I changed because i dislike clip- on attachments which rely on plastics. I don't care what sort of plastic it is, it will become brittle with time and UV exposure, and i would not like to be beside one which comes apart in flight. I can put all the props on in 30 secs, including giving each a light nip up. Just the act of spinning them on checks the internal threads, and you would certainly feel any problem during the nip-up. So far, i have 650km + on the same set.Thanks for the post. Sorry for your troubles.
I have a P4Pv2 arriving tomorrow, and that will be amongst the first things that I check in great detail.