I did something a little different with these, that I have not tried before. The neckline on these is elasticized, but instead of the traditional casing and elastic, I used cording.
I sewed the extra "ruffle" onto the shirt first. Then I sewed as if I was top stitching, but I had the cording sandwiched in between my pressure foot and the seam.
You just have to make sure that you sew the end really securely before you begin. After you are done, you pull the cord as tight as you want it to be, and sew down the other end.
I really think it feels softer to wear against the skin. It does what I need it to do, but it doesn't feel hard or constricting at all.
One other random tip I'll just throw out, if you sew on satin type fabric like this, it reeeeaaaally helps to use a nice sharp needle. I normally sew on knits, so I had my machine set up for that. I kept snagging the fabric until I realized my needle was the problem.
Have you ever used cording? What did you do with it? Any tips you'd care to share?
Isaiah 12:2 Behold, God is my salvation; I will trust, and not be afraid: for the LORD JEHOVAH is my strength and my song; he also is become my salvation.
Between Naps on the Porch
My Girlish Whims
Sew Much Ado