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.
2008 Martin Firecat Pro-X (29" DL, 66# DW), home-made TRG, new VEMs, DS Advantage/HHA Pro-5519 front sight, No-Peep Sight Eliminator, Limb-Driver arrow rest, B-Stinger stabilizer/dampener, custom upper STS, G5 Head-Loc quiver on custom mounting bracket. Gold Tip Velocity XT300 arrows with Bi-Delta 2.5" Sharkstooth vanes and Grizzly single-bevel broadheads, 498 grains at 262 fps (22% FOC)