I 've just discovered that I started a similar post last year, and though I’m more familiar with inkscape now, I wonder if this is possible.
I’m creating a number of curved top frames, each custom sized, but of a constant width.
They would be made, brick wall fashion, by laminating segments of the curve on top of each other. The two variables are the inner radius (with a fixed width, the outer radius is a function of it), and the angle of the arc. The ends are identical, and joined by a separate piece of fixed size.
I’ve made the arc angle about 50 degrees in this example, but I would want to set that.
The shape of the ends allows me to use a ‘bow-tie’ shaped insert which makes assembly self aligning.
While it might, in the long run, be as quick to layout each frame separately, I thought this might be a neat approach. The idea of using segments is to allow more economic use of the board.