I've been using this technique of footing the Easton Axis shaft for the past few years. My footings are 1/2" longer than the entire length of where the 100 grain brass inserts exten to within the shafts. Thus my inserts are entirely footed plus 1/2 inch. The footings are 3 inches long. Glue used is JB Weld. I use 2117 on Axis 300 and 2016 on Axis 340 and 400.
These shafts are so strong that I have accidently shot into a steel beam at a large degree angle with a 70# ACS-CX. Axis 340 shaft, 830 grain arrow traveling at 178 fps, hitting steel at a severe angle. The steel did not give at all, the field point is a 190 grain field point glued to a 125 grain tapered insert, again with JB Weld. The 125 grain insert ferrule actually bent at the smooth ferrule portion immediately above the threads of the insert. Clamped the arrow footing in a vise, used vise grips to unscrew the field point, tossed the field point away and screwed on a new simlarly built field point. Back in business, no apparent damage to the arrow. Arrow shoots fine with new field point. I'm not sure I know of any arrow capable of withstanding the extreme lateral forces that damaging shot made on steel created. No aluminum or woody I've ever seen could have.
Let the Traditional Police swear out an affidavit for my arrest for use of Carbon shafts through a longbow.