I have some progress to report...my HSTs are done! This pattern had an unusual way of making them (at least I've never done HSTs this way before):
First, I cut a 17" square of two fabrics. I placed them right sides together, then drew a grid of squares on the lighter piece. Diagonals were then also drawn in the squares. Then, I stitched 1/4" from each side of the diagonals, then cut the squares and diagonals on all drawn lines. From the 17" squares of fabrics, I wound up with 32 3 1/2" sewn squares and a little bit of scrap. I've never made HST blocks this way before, so this was a new one on me.
The stitching lines were a scant 1/4", so some of the squares needed to be trimmed just a slight bit to the 3 1/2" finished size. Also, because I used a continuous line from edge to edge, each set of sewn triangles had a few stitches on the opposite corner (from the center stitched seam). I quickly removed these corner stitches so I could open the piece up to press.
Next time, adding some color!