OK time to get started on this dress. I must say I can already tell this is going to be a challenge. Luckily I keep getting comments from those who have already made this pattern so hopefully we can dodge some bullets.
1 - Staystitch - Staystitching is permanent stitching that helps to stabilize curved edges.
Staystitch the front and back pieces 1/4" in from the seamline (or keep the edge along your presserfoot). Start in the middle of each piece and then stitch to the outside edges. I used a regular straight stitch for this (not a stretch stitch). Backstitch at both ends.
2 - Cut 2 pieces of lightweight interfacing that are 3/4" wide and about 7 inches long. Apply to the wrong side of your fabric on the seam allowance of the left side of your front and back pieces. (where the zipper will go)
3 - Pin front and back sections together at right side seam and stitch with a 5/8" seam allowance using a stretch stitch.
Stretch Stitch - my machine has a stitch that is a slight zigzag that allows the seam to stretch slightly after stitching. Number 9 on my machine. Check your manual to see if you have one. If not, a very wide (almost straight) zigzag will give a similar effect. (test on scraps first)
4 - Apply fusible interfacing to 1- front midriff and 1- back midriff. Put right sides together and stitch the front and back midriff on the right side seam with a stretch stitch.