Congrats on winning the blue ribbon. That is a stunning quilt and it inspired me to google 4-patch posey and I found this U-tube tutorial
http://www.youtube.com/watch?v=tfxWeL1_UvM Also Connecting Threads has a good pictorial step-by-step. Of course, these instructions do not include the beautiful touches you added to your quilt to make it a winner. Thanks for sharing with us.