Sheldon's page covers it for the AW conversion, but apparently a better 2 speed fixed conversion can be had by starting with an SRAM T3 see (warning 20Mb download):
http://fixedgeargallery.com/articles/grahamwebster/grahamwebster1.pdf
The same guy has also done a conversion of an SRAM P5 to fixed 3 speed:
http://fixedgeargallery.com/articles/grahamwebster/TECHNICAL_ARTICLE_SRAM_P5.pdf
@d_c started
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Sheldon's page covers it for the AW conversion, but apparently a better 2 speed fixed conversion can be had by starting with an SRAM T3 see (warning 20Mb download):
http://fixedgeargallery.com/articles/grahamwebster/grahamwebster1.pdf
The same guy has also done a conversion of an SRAM P5 to fixed 3 speed:
http://fixedgeargallery.com/articles/grahamwebster/TECHNICAL_ARTICLE_SRAM_P5.pdf