Bearklr, I put in my own inserts and you do have to be very careful. Mine function great, but they took a while. Also if the shop didn't let them sit perfectly horizontal for 24 hours that can cause problems also. If you do it correctly, these arrows are great!!. Many people have talked of spine degradation in this arrow, but to be honest that happens in any carbon arrow. Also just last week I bought another half dozen and shot them with the ones I have been shooting daily since early april. by looking you wouldn't be able to tell the difference. If it's not a hastle you may want to go back to the shop and have them cut the arrows for you and install the inserts yourself. Good luck.