So sinuous, so ... difficult to sew. The Sewing Lawyer should have whittled the standard 5/8" (1.5cm) seam allowances down to 1cm but instead, she carefully pinned, held her breath, and sewed. (Why am I so enslaved to 5/8"?)
Afterwards, out came the trusted and well-used seam ripper. An inch here, 3 cm there, resewn. The last stubborn puckers eliminated (left back) through more ripping and hand basting before sewing again (3rd time). The upper yoke seam allowance trimmed down to about 5mm so it will turn nicely back on itself. This very thin fabric needs serious pressing because it has a tendency to pucker. Thank heavens for the gravity feed steam iron and suck and blow ironing board.
Holding her breath again to topstitch. Smooth and steady are the watchwords. Geometric perfection is not required. The Featherweight is perfect for this.
I thought heavy topstitching would be an interesting contrast with the very smooth fabric and the very curved seams. Hope you agree.