I think they were breaking when people installed them improperly. I put one in my driver and it was fine. Even pulled it again, trimmed the tip a little more and put it back in and it was money still. I think with the way the paint was, people were buffing the tip too much and going into the graphite. I just lightly abraded the paint coat and epoxied it in. No issue with mine
Im definately thinking about picking one of these up for my 909d2, but ive heard they break quite easily. Has anyone had an epic break on their driver?