Home made squares

[Sumpter250]

I've been using the "corner braces" as miniature squares for a long time ! 8-)
They fit in my model builder's tool box, far more easily than almost ( I do have a couple of Union Tool Co. 2.5" X 4" ) any commercial square.
There are places on some of my ship models where even smaller squares could be very useful. I had to have seen your squares before, but memory, it seems, is now in short supply - - - it used to be terabytes, "now it just bites"
I'm thinking 1/4" square brass, and 0.032" X 0.25" brass strip, mill .032" deep X 0.25" across the square stock, and solder the blade. Maybe even .125" Square, and .125" X .020" strip.
It would be a bit more "permanent" than 0.040" styrene sheet triangles !