That's great Anton! Thanks for digging those out of the digital cobwebs
It's a little more intricate than I'd envisioned. I like it, for nothing more or less than another option to consider.
I had looked at the one Bruce linked to, too. Seems like it would be handy if I was a regular woodworker. But, being as I only need to cut some baffles and butt cheeks, and have no foreseeable use for the jig beyond the rare speaker cabinet project every-so-often , $50 is a little on the steep side. Plus, like you guys said, there's the satisfaction in creating a home brew solution.
The jig you put up; I'm guessing the threaded stock is used strictly as a clamping solution and not something that you would actually screw in and out to adjust the radius. Is that correct?