B6183 is my intended:
Here are the muslin shots of a 16D:
Not enough ease, so I am going up a size, swayback, increasing back hip and taking a nip at the back neckline.
Here are the muslin shots of 18D with the adjustments:
YAY! I love it - I am wearing it to test the remainder of the day and then I will decide if there are any more changes I need to do.