Thanks for the link.
However, since I'm using axis arrows, that adapter doesn't offer any strength advantage over a standard screw in BH since the internal diameter of the axis is the same as the shank of a screw in.
My adapter looks the same only the diameter is the same as the outside of the axis arrow behind the taper. This section is 3/4" long. Then it steps down to the inside diameter of the shaft. A 2020 footing goes over the whole lot to BOP. Adapter weight can be varied by trimming the length of the shank that goes inside the shaft.