After posting this project to Pattern Review, I was asked by several people to show how I did the Simplicity 2181 Full Bust Adjustment. So, here we go. In my very non-conventional, fly by the seat of my pants way:
Red lines approximate where I cut my pattern apart. When it was in pieces, I did my adjustment sort of like this: Note where the pieces were spread apart, and where they had to hinge. This is a weird sort of underbust seaming, but once you see how it works, I think the adjustment will make sense. I made some notes on the following image to help:
Blue rectangle represents where the seam for under the bust will be created by folding and sewing together, matching dots and notches. In the photo below, this seam is within the blue square:
Now, if that doesn't make sense, by all means, email me!
It's going to be a bright, bright sunshiney day!