I was poking around the internet looking for something different to turn and found a YouTube video by Alicja Mazur on her Epoxy Wood Channel. https://youtu.be/8C3OL4gbZp0 .She also has a web site at https://www.epoxywood.uk/
My contribution is to document the measurements, order of steps and a pretty drawing.
The piece of wood to start is 50mm square and 130mm long.
Mark the center of both ends.
The head stock end always stays in the center mark.
On the tail stock end draw a line. We will mark 5 points on the line.
The center mark is point 3. Point 2 is 5 mm from point 3, Point 1 is 5 mm from point 2. In the opposite direction point 4 is 5 mm from point 3. Point 5 is 3 mm from point 4. I use a center punch to make indents on each of the points.
The headstock is a 20mm Stebdrive Crown drive. The tailstock is a live center with the removeable center point.