Used my last 14 inch octagonal handle today whilst waiting for my order to arrive.
18 more 14"ers coming soon.
i never use epoxy, but i do use a wood glue on the soft wood wedge.
the not only does it give that extra bond but allows that wedge to be soft enough to get in all the nooks and crannies of the handle cut.
this makes a best fit.
i know when i have too many projects, life events and obscene work load when i thought i had already ordered the handles but in all reality had NOT.