Thanks for all the suggestions! I am already using a leader block, but I will try scooting it closer to my triangles to see if that helps. Unfortunately, there is no single stitch plate available for my current machine. I do have a vintage kenmore machine with one, but it needs a trip to the repair shop after the end of the year, it will only sew two or three stitches before the tension slips and it starts breaking thread.
I did get a few sets done tonight, will try a few more tomorrow. Hopefully I can get through all of them before friday!