OurWorkbench - You have found what I wanted with Mary's Triangles, she gives cutting measurements for a few different sized blocks. Thank you so much, and thanks to all who helped. When one has a name to go on lots of sites come up.
Checked a video for the Cats Cradle ruler, and that's another name for the block.
Last edited by Gay; 12-05-2021 at 02:28 PM.