I used to balance and change out props on my P2 fairly regularly. I have flown 49 total miles on my Mavic's original props, and they still seem to be solid. I keep them clean and inspect them for damage, as well as checking their friction at the hub to see if they're loosening up. So far, no problems. Are any of you changing your props on a regular basis to avoid fatigue /fractures? How many miles or kilometers have you logged on a single set of props?