And the SVG and AI file if you want to cut your own. Probably not useful since you’d have to have exactly 0.19" material for the measurements to be true. (scaling will throw everything off)
Oh, one thing I’d change (if you intend to make one). The fingers protrude ever so slightly out of the base, and that makes it not useful as a vertical square tool. So they could use a little shortening. I’ll probably just sand mine flat.
Wow! I haven’t seen one of those in years. I used one once to build a mortarless pizza oven. Between the gauge and a bit of trigonometry I was able to calculate the cuts needed in bricks in all dimensions to make them slot into each other without needing a mortar layer. Took a good awful extra pile of bricks though