I ordered a Try It pack of needle tips from KnitPicks.  I really like the concept, one set of cables and one set of needle tips.  Sadly, the Harmony wood needle tips didn’t hold up.  I had just started another mobius scarf and the wood separated where it entered the metal portion of the tip.  If I’d bent the needle, it would make sense, but I was pulling the stitches along the cable while holding the tip.

I think the wood needles would be fine in a bigger diameter, but in something as small as a six, they just aren’t going to hold up.  I’ve switched to size seven nickel plated tips.  I’m fairly confident they’ll hold up to the task at hand.