Well, I got a little to confident after doing some simpler block of the month blocks. Now I have started a scrappy Civil War Tribute quilt. The first block came out 18 inches instead of 18.5 inches. Good thing it was all scraps of fabric. I love the inside of the block and all the points are ok so I am going to use the block somewhere else and do it again.
Does anyone who has made these blocks have any hints or suggestions to make it easier?