I made two of these Arrowhead blocks this afternoon in about an hour. The instructions from Quiltmaker website were quite clear. However, when I got to the last step I could not get a 9" square - only and 8 & 1/2" square. I don't really see that as a problem, with this block if they are all consistent they will go together just fine...just a hair smaller. Would like to know where I went wrong though.