I do not use any kind of heat on my carbons,like with hot melt.You can tune your carbons without glueing the inserts in,by squeezing the insert in with some saran wrap for tuning.I use a two part 24 hr epoxy for glueing inserts.The key also is to properly prep the inserts and shafts.I etch or scratch the inside with a brush,then I'll stratch up the insert with sandpaper and then clean everything with alcohol.And then I'll epoxy them in.The nocks are just a press fit,so you can rotate them for best fletching clearence and easy replacement.Do not glue them in.