I used Brenda Henning's Triangulations 2.0 when I did a Mariner's Compass Block. It is absolutely wonderful, easy, and fast. I made 2 inch hst and it was a breeze! I looked and looked online because the price is 27.95 which would be totally worth the money, but I found it at Keepsake Quilting for 17.99 and 3.99 shipping............. I ordered it and believe me, it will be the only way I ever do half square and quarter square triangles, that is unless they come up with an easier, faster, more accurate way. :wink: