I'll vouch for 3Rivers customer support being very good. When I was buying my Grizzly broadheads and screw-in adapters I called them and got some very good advice that enabled me to glue these pieces together about as perfectly as could be done. They spin-test very well and fly great. Just thought I'd pass on my two cents and experience with 3Rivers. BTW good luck with your repair project. And be watchful and careful afterward. We'd hate to hear about it causing anyone harm.