Great yarns everyone!
Here are some core spun yarns.
They are my first skeins, I used Jazzturle's tut http://jazzturtlecreations.blogspot.com/2009/11/how-do-i-do-it-coreless-corespinning.html
and the bellwether tutorial http://askthebellwether.blogspot.com/2008/12/yarn-story-core-spinning-ballerina.html
Jade in the ruff
This yarn I did not spin the over spin the core thread in the opposite direction.
Wool, soy silk, sari silk, thread, fire star, silk noil, and nylon.
Fashion is Danger (blue and red) and Poison (brown and green)
Fashion is danger skeins are core spun with the core overspun in the opposite directions of the ply. Then the core spinning was spun to balance out that twist. . . in theory it works. But I found it did not work for me. Jade in the ruff was less over twisted then a these skeins.
Poison is a single with core spun elements.