the head definitely has me interested as well. i am very curious how it performs. Due to the use of their cam action blade system, the blades themselves are not aligned with the center of the ferrule/arrow shaft. i wonder what kind of stresses are placed on the blades when they open in a animal...i'm not a mech engineer (just an electrical engineer) but it does seem like there could be introduced different stresses on the blades than those in the traditional styles. Any comment?