Interesting, this is being done with HSTs. I did a Lone Star quilt, which has similar diamonds in it. I used a method, I saw on Fons & Porters Love of Quilting. It involved sewing strip sets together. Cutting the strip sets on 60 degrees to make strips of diamonds. Then sewing the diamond strips together to form 1/8 of the star. Sewing the diamond strips together was the hardest. The show went into how to pin the diamond strips together to get the points aligned. I found it to be pretty easy.