Circular cages?

[Klyde O'Scope]

Slotting the screen into the flanges is a great idea. But the flanges are made for 1/4 inch panels, screen frames won't fit into that, as they are 5/16 or thicker in my experience.

Here's the QF engineering dwg.

The slot is .320 inches. 5/16" is .3125". That's what... .0075 difference? Looks like a pretty good fit to me. I can probably pinch them a little tighter if the fit is too sloppy.

You can spline the screen directly into the flange though, that would still be easy to replace the screen.

Not for this all-thumbs! ?