I have had zero issues with HIT inserts......but I read the Easton directions that come with the shafts and also used their two-part epoxy. Once they are installed, lay them FLAT to cure for 24 hours and you will be fine. Also no issues with the "dead space" between the inner HIT and the point. I have shot them for several years into bag targets, 3D targets, and a big foam block for practice. Also shot them through many animals and taken numerous field practice shots with judo point heads.