I am completely infatuated with these grid interfacings since I made the Quiltsmart Mondo bag.
There is absolutely no way that I could have lined up 192 individual 2.5" squares with that kind of accuracy regardless of how much I practice.
Have you seen Quiltsmart's kit for making a Jacob's Ladder quilt?
https://quiltsmart.com/jacobs-ladder/
You fuse squares and triangles to the interfacing, then the way she stitches and folds and stitches is very clever.
For $52 you get the interfacing for a twin sized quilt along with instructions.
I am seriously considering making this my next project.
Dawn