I've just found more information about the fixed adaptor for cassette hubs;
http://www.fixedgeargallery.com/reports/handmade2010/262.jpg
http://www.fixedgeargallery.com/reports/handmade2010/257.jpg
that's one precise way of getting your chainline spot on.
@edscoble started
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I've just found more information about the fixed adaptor for cassette hubs;
http://www.fixedgeargallery.com/reports/handmade2010/262.jpg
http://www.fixedgeargallery.com/reports/handmade2010/257.jpg
that's one precise way of getting your chainline spot on.