It seems as though the Phil Wood Lockring would not be an issue? Even if it is 'too fat' so to speak, it's functionality is no different, right? If you got a thinner one, it would still hold on just as tight (if not less tight) as the Phil Wood Lockring. Since you run the chance of it being slightly thinner, would it not be better to simply use the Phil Wood? Who knows.. Enjoy the wheel!