This work was inspired by a very clever tool presented by Marv Klotz on
Given a block held at an arbitrary angle in a mill vise, how do you locate the top corner? Marv's tool is elegant. Of course, I'm always looking for other ways to do the same thing. Here is a method that uses no special tools. It assumes the faces of the block are flat but not necessarily perpendicular.
If you are interested, please see
Your comments are welcome. All of us are smarter than any one of us.