Your Chi sweaters look fantastic.
I've been practicing with my KK. I made the Chi sweater starting with the neck area first so I could do a brim/cuff (it looks more like a mock turtleneck), then did the armholes and knitted the rest for the body. I used the super stretchy bind off for the end. I made a pretty scarf for my daughter, but I have to say, it takes forever to get to 60", so I won't be making another one for awhile. I'm in the process of making a pair of socks (more like slipper socks). I've been experimenting with different kinds of casting off stitches too. I like this site:
It shows different kinds of stitches and casting off methods. The directions for the socks are on here too.