I used hex shafts from Bob Burton at Whispering Winds for several years in the late 90’s thru around 2006, give or take a few years. Never had any issues with them. But they were mostly built by Bob. Used them on my mountain lion, bison, and over twenty deer. Switched to Surewood shafts ( because they are a sponsor and have an excellent product) when Bob sold Whispering Winds and I started building my own arrows again. I just looked at 3 footed hex shafts that are at least 12 years old and two of the three are perfectly straight. The third straightened right up when I ran a hook over it several times.