While I'm tuning I hold the inserts in temporary with a small piece of plastic wrap, like saran wrap. It takes up enough space to hold it in for as long as you need it to. But for a permanent hold this is what has worked the best for me after three years of experimenting with different glues and techniques. After cutting the shaft to a predetermined length, I rough up the inside of the shaft with a piece of emery cloth or a rifle bore brush, then I clean the shaft and insert with MEK or you can use acetone use a Q tip on the inside. I have pieces of 1/4 dowel cut to 1 1/4" long ( take a shaft with you to the hardware to find a size that works for your shafts. I then dampen the dowel inside of the shaft and insert with water, I apply gorilla glue on the dowel and push it in the shaft flush, then cote the insert with the same glue and push that in till it stops. clean off the excess from the shaft and stand it up insert down till it dries. This will give some of the toughest arrow out there.