I have a black phil filp-flop with a 16t DA cog on one side and just a lockring chilling on the other. I just double checked to make sure what was going on and it looks like at its tightest, the phil lockring seems to show a thread (with no cog). The side with the cog has two threads showing. So I figure it's one more than normal. I'm really not worried at all, but I will be buying a Phil cog when the come out anyway, you should do the same.