I feel your pain. Just finished a quilt with over 600 2" half square triangles. My first time to use thangles and made a lot of mistakes. Shorten your stitch and do a lock at beginning and end of each stitch line. I pressed mine open to eliminate some of the thickness but will not probably go with a pattern like this again. It was a kit with some yardage cut and pinked so that made it even harder to match up edges.