mate don't weld it! there are cheap hubs that are reliable enough, such as the SJS/Formula/System EX jobbies;
http://www.theoldbicycleshowroom.co.uk/system-ex-alloy-36-hole-rear-fixed-fixed-track-hub-898-p.asp
or two for £40;
http://www.sjscycles.co.uk/product.asp?pf_id=11137&src=froogle
@edscoble started
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mate don't weld it! there are cheap hubs that are reliable enough, such as the SJS/Formula/System EX jobbies;
http://www.theoldbicycleshowroom.co.uk/system-ex-alloy-36-hole-rear-fixed-fixed-track-hub-898-p.asp
or two for £40;
http://www.sjscycles.co.uk/product.asp?pf_id=11137&src=froogle