I use Triangulation software when I have a lot of HST to make. When I made my Bonnie Hunter Celtic Solstice King Size quilt, it called for 1.5" finished HST. I needed an enormous amount for the pinwheels. With Triangulations I made about 23-24 sheets of 24 per sheet of HST at a time. Every HST came out perfect, no trimming needed. I LOVE that software!