hey lana
if that work out for you great, if you want to try a different way here how my sunflowers look.
what i do different i put the row of petal way to the outside of the maria and than start imploding and when i do a push an the hole between the petals is down to 9-7 mm then i put a big dot of momka brown sparkle (or Challenge Sunflower) in the center. being careful not touch the petal and go back to imploding and than at the end push the maria back really flat. the down side the color is stretch a lot so some colors can get transparent, that why i ran the whiteout up in the yellow. i will have to try a double row of petals.
or i guess i am saying if the center coming up to far wait and put it on later after you have imploded the petals some.