You are only half the way through. You also need to know how your crankset will work with what BB. Also, you take the hub chainlin center to shoulder, add your cog offset to it, and that's your chain line. The cog offsets are listed above the hub offsets on Sheldon's site. Match your chainline of the hub + cog to your BB + Crankset, and adjust BB as needed. You can get a few mm one way or the other by changing the cog you're using.