I'm doing that pattern right now. . 160 hsq's. . i.e. 20 blocks. I admire you. I'm thinking it's more challenging than I thought it was going to be. I made the first 8 hsq's thinking, "That was a breeze." But then matching up all the points from square to square was something else again. My thought now is, "I probably will stick to mostly rectangles from now on." Or not. I do love the look. Yours is beautiful.