Thanks for the input.

I'm not sure, I'll have to look as the Nexus hub hasn't arrived yet, I just bought it yesterday. If they don't match should I take this as an opportunity to change out my cog at the same time to a 18/19/20T based on where I ride (all flat)? Also, with the three speed hubs, do the same single speed chains work? I'm assuming they do as there is no cassette where thickness may matter?