I first want to thank all the ladies that are bringing me their support. I would never have been able to undergo this project without your comments. This SAL is fantastic and I am learning so much everyday.As you can see back sections are sewn including the quilted lining .
To achieve this I am following Claire Schaeffer's method in Couture Sewing Techniques
This book is invaluable.
After I quilted the lining the vertical seams were hand sewn with bee waxed thread
As is explained in Claire's book, one important difference between upscale Ready to wear and Haute-Couture is the huge amount of hand sewing used in Haute-Couture. For permanent sewing you have waxed your sewing thread before.
Ann from Ann's Fashion Studio sent me this great reference concerning tailoring techniques, including how to wax your thread. I know it is time consuming but I hope it will pay off. Furthermore, I find this hand sewing very pleasant to do.