I am not making the doily, but I have enjoyed following along to see all of your great progress pics. One thing I noticed about the pattern picture is that it looks like the flowers on the outside all overlap petals a bit (they are not flat). Just a note of encouragement that I think you all...
Not hard to make at all. It is mostly chain stitches and double crochet. I thought it would be a great "beginner" doily for a CAL like this where some people may not have worked with thread/made doilies before. It is simple, but still interesting to stitch as you watch the pinwheel form. And...
I just made this one for my mom's 60th birthday and it was very well received. The pattern is from 1953.
http://web.archive.org/web/20021105021110/www.angelfire.com/folk/celtwich/PinwheelDoily.html
Here is a picture: