I know it's not a bow, but I thought this pic might be of interest. I had this old ELB tip from a smashed bow lying around so I sliced it through the bandsaw to make a little demonstration/show piece. It shows a slight glue filled gap near the tip, but otherwise it's a pretty good fit, also shows how a curved taper fits in and how little horn is left.
Also shows how I cant it a little towards the back of the bow and the core of the horn runs pretty centrally.... great nock... shame the bow blew!
Del