RE: Arrow building...
I just cut my first 2 carbonsa few nights ago. I got tired of ordering cut shafts that aren't straight.
Cut 1" off of both ends then spun the arrow to see if either end wobbled. If the nock end wobbled I cut another 1"and check for wobble. If no wobble I did my finish length (28.25") offof the insert end. I then wrapped and fletched then and both arrows spin better than any of the ones I ordered. Yes, it's took a little longer to do that but at least I know I have good arrows. I then used the G5 tool which is well worth the money.
I've been using Goat Tuff for inserts since the beginning of the year. You do not have a lot of time to push the insert in like you do the longer setting epoxy. However, you can shoot the arrows soon after the inserts are put in.