So here is the top completed. The original convergence block is the center of the quilt, with triangles matching one of the predominant colours on each side. Those triangles were difficult – in the end, I laid the sewn convergence block on the floor, laid paper under one side, then drew a triangle – the base of the triangle was the length of the block side, 45° angles to form what is an isosceles triangle! Where the two sides met created the apex of the triangle (which I made sure was a 90° angle). (I remembered to add seam allowances to each side of the triangle.)
I didn’t have enough fabric left to create the triangles in a single piece although overall there was enough fabric – if I made two smaller right angled triangles, stitched them together on what would become the diagonal of the overall block. Then I had enough width to accommodate the edge of the convergence block.
Once the triangles were attached, I added a 3/4″ sashing piece for stability – the sides of the triangles on the outer edge were all on the bias and needed to have something attached that would retain the overall shape. I cut the sashing on the length of fabric (since I had just enough length of the Kona solid I used). Then added a 4 1/4″ border from a fifth fabric that I’d bought as part of the set with the other four fabrics.
Now I have a 54″ square top. I need to think about what to do with the second side (back). I bought another 1/2 m. of each fabric, as well as 2 1/2 m of the dots fabric for the back. Flying geese? Half square triangles? Strips? Crazy quilt? Lots of possibilities. I’ll wake up with something in mind, I’m sure. That’s how these things seem to work themselves out for me.