Amer. Patchwork & Q'ing has had that method out for years. I fail to see why you need to buy yet another ruler just to a square 1" bigger that finished HST size, draw a diagonal line, sew 1/4" on both sides of line and cut in half on the diagonal line! I've not been able to find this tute on the mag's web site anymore, so if anyone wants a copy, PM me your email. Also has method for 8 at a time. Pam Bono's grid method and those by others is also wonderful! All of these are accurate and none needs another notion!