I could not live without my Custom Centering Cones that I have turned out of ultar-high molecular weight (UHMW) polyethylene. I have turned lots of different shapes and use them often.
In 2007, I wrote a magazine artificial that explains how to turn your own cones out of UHMW.
See my “Custom Centering Cones” magazine article on page 49 of “American Woodturner, The Journal of the American Association of Woodturners, Winter 2007, Vol. 22, No. 4″ Or click here for the PDF. (Magazine photos by Joe Larese)