well alot of the newer sets need a .5 mm spacer because the lock ring will not but up against the cog causing it to to slip all the time if you skid.
I would also find the gearing you love and maybe loc-tite that sucker on with a MILD loc-tite I repeat MILD.
I have had nightmares with my hubs ,but they are fine now but affraid to remove and either of my cogs.
also if you crank to hard on that lock ring you might bend the thin metal that the lockring threads on to compressing it against the bearing cone causing the bearing cone to tighten while you ride so that the hub does not spin freely...big bummer ! happened to me but I am very heavy handed.
so get the .5mm spacer from yourlbs don't use any thing thicker or you won't get enough threads under you lock ring and it will fly off when you skid into a red light also a big bummer.
I had it the worst out of my friend who have them but again I am very heavy handed.
so that my advice from my troubles
but I love the wheel set hop you got the mp3 warranty.
but the seem bullet proof so far I have dropped 3 steps on them and still straight as hell!