Soft jaws. By NYC CNC. 5:34 video:
https://www.youtube.com/watch?v=Eex2Xei9koU
Previously:
https://www.homemadetools.net/forum/...863#post179213
https://www.homemadetools.net/forum/...506#post177823
https://www.homemadetools.net/forum/...049#post172014
https://www.homemadetools.net/forum/...754#post152151