The epoxy creating cavities in a core is totally different than "A" joint. My "A" joint has the bore filled with epoxy, then put together & excess epoxy spills out. With a core, the epoxy is pushed out without a reservoir, so needed glue that was there is no longer. I'm sure there's ways to make it work. I just don't really care much because I rarely core. I just stated my experience, my observations of a comparative test between poly & epoxy. To each their own.
As for buttsleeves, I don't use epoxy. I use wood glue. In my opinion, nothing is better for wood than wood glue. It's as strong or stronger than epoxy & leaves no glue lines. Tollerances must be tight, but that's easy in the short buttsleeve. I believe it would be the best for coring if it were possible to keep it from locking up before the core was fully through. Just my opinions. I have four types of wood glue, two epoxies, two polys, & a half dozen cyano types & I use all for different aspects of cue construction. I'd say anything that works well is good enough so long as who's using it is comfortable with it.
I mean to tap or not to tap and trash it. That could be a question or an action or an oops. :grin-square:
