Mitre box (miter box) for 22mm fly screeb

Just a little mitre box for making 45 degree cuts on 22mm fly screen frames. Better and cheaper than store bought aluminium one

It was designed for 9mm thick fly screen, but if you're using thicker fly screen, I see no reason wh it can't just be scaled up vertically in the slicer. You want it to be 15mm taller in the slicer than the depth of the fly screen.  (eg, if your fly  screen is 16mm thick, scale it up to 31mm tall).

I guess you could scale it up or down in all directions to use with smaller/bigger frames (eg scale up to 113.6% for 25mm frame)

Screw down to a surface for extra stability