Well my issue is the cog needs to be closer to the dropout. I thought modding one but haven't yet. I don't like the engagement of this hub. I read somewhere it was at least as good as XT hubs but would disagree strongly. I have just built a SS wheel set using some Halo hubs and WTB i23 rims. It's dropped the weight of the bike from 27+ to 25.3lbs. I've also just ordered some Raceface carbon bars to help with hand fatigue.
Wondering if your still using the nexus hub or if you've given up on it?