As promised, I added further fitting information to part 2 of the tutorial on making a bodiced petticoat from Jennie Chancey's first Regency dress pattern.
The added material shows the process of the first fitting: setting the trial darts on the bodice to shape it. We were lucky with Polly's bodice: it went together very well and she graciously allowed me to photograph the process for you.
Another note: we actually fitted her bodice a week or two after the first fitting session at our sewing circle meeting. By then I had fitted four other bodices, and so I was neater about pinning, but her figure also was perfect for fitting the bodice the way Jennie Chancey's example did.
To read the added information, please see A Tutorial: Sense and Sensibility Bodiced Petticoat - Part 2.