That's it! that's the one I will do as a "leaders and enders" for the ## of scrappy 16 patches that I have made... out of 1 1/2" squares. It should work, as the blocks are 4x4"
Yesterday, after I saw your post I went ahead and prepared my fabrics for some 1/2 square triangle. I printed out some template for some "triangle in a square" that I intend to paper piece, so no special ruler and no math involved....
Thanks for this idea!