Thanks for the advice, Preston. I just bought 2 more dozens of the GT Velocity Hunters, and will try the Tip Grip when the UPS guy delivers it tomorrow.
Huntingarcher, the problem of mushrooming shafts when the inserts get shoved back into them has disappeared for me, now that I only stump shoot or squirrel hunt with shafts footed with aluminum arrow shaft sections. An inch is enough, the only trick is finding the shafting that fits over your carbons.
That being said, the problem now is nocks popping out, and inserts coming out. Hopefully the Tip Grip will solve the insert thing, and I will start improvising with the nocks. I use the standard GT nocks, or sometimes I use the nock adapters and Mercury glue-ons.
I switched from CEs because I got a mismarked batch, and I also found that I couldn't use the same nocks and inserts on the 90s as I could on the 150s. I really like that the inside diameters of all the GT spines are the same, so I have the same options regarding brass inserts and nock adapters throughout the range of spines.
Killdeer