I had a couple shafts back when and then bought a few off one of the websites. In 30 years, as far as I know only 2 shafts have failed. Both were bought used at the same time. Luckily at the range today I noticed that the ferrule had cracked on my KE4 TC that is a week old. I then noticed the tip was bent, so time to remove the adapter and try in an other club. Oh well, whatcha gonna do?