Make the circle first then place the middle on it. It will cover the bottom of your points that makes sure they are all covered. Nobody is flapping in the breeze as they say.
Some fold under the edges and top stich around it. I'm lazy and hate trying to fold under such a small amount. That was why I satin stiched all around.
I used just plain white thread on the one on the picture page but the one I'm working on now I am using varigated thread.