I'm nearly finished with another Hitchhiker Scarf. I'm making it on #2 needles with Zephyr yarn (50% wool/50% silk). I've added my own K2tog and YO's for interest. The pattern calls for 41 "teeth" on the edge, and then bind off. I already have a few more than that, and because I still have some yarn left, I've continued to add to the length. Now I have to decide when long is too long. I'm not sure I'll use up the whole ball, but it will be close.