Having had a P2V+ with metal inserts in the props to attach to the motor shaft I have concerns about the P3 props being all plastic. Is there any chance of stripping the internal prop threads or throwing a prop after repeated tightening/untightening? I don't crank them down especially hard- hand tighten- but they seem to not totally lock like the P2V+. If these get stripped even just a little bit you can't really tell. I'd hate to find that out while in the air. Thoughts??