Earlier in the year, I finally moved up to carbon arrows as a result of a Christmas gift card to Bass Pro Shops. I'm trying them out after 40+ years with aluminum. The carbon arrows are the XS Envy 500 with 100 grain bullet points. After a couple of shots, the points loosen and you can hear them rattle when you tap them on your hand. Surely there is something like a lock washer to keep them tight. I had no trouble with the aluminum arrows as I could put a drop of glue on the threads. Heating a bit loosened the glue. Afraid to do this with the carbon arrows as I don't want to ruin the shaft. Thanks.