Stripped hub - feck!

You haven't mentioned the cogs you are using? Phil Wood on their website do not recommend using Surly or EAI cogs on their hubs as their width at the shoulder can reduce the amount of thread engagement on the lockring.

I've been using a Surly cog on a Phil Wood hub for ages without any problems. Has anyone had problems? Or is it just PW trying to scare us away from their competitors?