Half-Square Triangles Galore

I've been working on my quilt based on the arrowhead picture. I visualize it as Broken Dishes blocks set together with narrow sashing (fabric to be chosen). I've spent several days making the half-square triangle pieces to set together and then putting trial blocks on the design wall to see if my original idea of making each block one color, but several fabrics would work. I was concerned about not having too big a value difference between blocks so that the whole thing would flow. I think it will work, but the sashing fabric choice will be important.

It's also important to have precise piecing on this since the black makes the points stand out so prominently. Different quilters have their own ideas about the best method for making half square triangles. I have a real problem with the idea of Thangles (sorry Thangles fans out there); they seem to me a waste of money and materials. And as for the pencil line method, I can sew more accurately than I can draw a pencil line. For a long time I was a purist: If you want to piece accurately, just practice until you can. But I've given up the idea of practice making perfect, at least for me, and now I cut the square a bit larger than necessary and trim it down after the triangles are sewn together. For a 3 inch finished square, I cut 4 inch squares, cut them in half diagonally, sew the triangles together, and then trim the pieced square down to 3 1/2 inches. The trimming is a bit of a pain, especially when there are so many blocks, but the results are perfectly accurate.