When you have a wood vise such as this one:
Here is a woodturning deep hollowing tool inspired from the famous Rolly Munro hollowing system. [!(https://www.woodworkersguide.com/guidebase/wp- content/uploads/2009/04/04_16_09_the_rolly_munro_articulated_hollower_01.jpg)](https://www.woodworkersguide.com/2009/04/16/the- rolly-munro-articulated-hollower/)
I must give credit to Rick Sparber for the tool I’m presenting here. He published the idea of it on the [homemadetools.net](http://www.homemadetools.net/forum/self-centering- scribe-8482) forum.