Geez, Al, that had to be one big flower in the BG! I like the idea...have done it before with many flowers but never tried to capture one on one like this...neat idea!
Might think about doing a vignette around the outer edges to close in that BG of yellow...just a thought.
Liked the outer (yellow) flower's OOF petals mimicking the in-focus flower (though with bit more curvy edge). Realy good job in keeping the flowers centered in windy conditions.
I must give this one a try !