I foot all my carbons these days. We have rocks everywhere, in the desert, in the forests, everywhere. Miss with a wood arrow and not much chance of it living. They do look cool when they splinter into a bunch of pieces. Their is a thread in how to section on what alum shaft sizes match up with various carbons. I use golf shaft epoxy to glue them on.
If you use them for targets you need to chamfer the rear of foot to make it easier to remove. I use a cheap plumbers chamfering tool I got at Harbor Frieght.