No prob. If you have a hard time finding the Wooly Nylon, you can order from Kaleidescope. I know there's plenty of other places what carry it (I've picked it up at LYSes here in NYC) but Kyarns is a good option if you're stuck. I've ordered from them a few times and they are always prompt and helpful.

I confess I have not yet tried the afterthought heel, but it's on my list of techniques to master. =)

(And confession, I found your Rav queue and raided it for my own queue, and may I just say you have magnificent taste in sock patterns? =D)