dont underestimate the need for a QUALITY lockring. its the single most underrated and important part in your drive train. dont skimp, but it doesnt have to be the highest quality. ive run formula hubs in multiple applications and ive always gone with a DA cog no proplem. I could have used a formula lockring but DA seems to make more sense.

ive heard enough stories from people who've murdered hub threads from using the wrong lockring or using a cheap one. it keeps your cog on and you safe. dont be cheap in that area.