The more I read, the more confused I get. For instance, on the White Industries FAQ it says chainline is 47.5 on the freewheel side but 43 on the fixed side. Should I be aiming for a 45 mm chainline then so that both are similarly off the ideal? What exactly would a 110mm BB yield for chainline? And how does one calculate it, other than by asking here? The Sugino site shows 45mm on the XD2 when used with 110 mm BB, and when configured as a double. Isn't the chainline on a double measured between the two chainrings? How does this help me when calculating for a single? Also, that's the XD2. I wasn't able to find the XD on their site.

Phew! Thanks again for any help...