My experiment using embroidery thread was a success. I has a wonderful shimmer in full light and is a bit thicker than typical thread. I did buy embroidery needles and have had no thread specific problems.
The feathers above turned out so well that I officially announce that "I have mastered feathers".
Lori Kennedy design that I used on Evolution. My biggest challenge for this square was trying to keep my stitches even and medium in length. When the stitches are short, they lose the shimmer from the embroidery thread. I am learning that the fact that the lines aren't straight is no big deal. After washing, it will look great.
And then there was this. It started with me following the swirl on the brown batik. And it ended in a freaking ridiculous micro-feather. In 2 colors. The green & brown together is 3 1/2". I know.
Back to work. Hopefully some updates and progress in a week.