I get that the fame has sentimental value and you want to keep it, nothing wrong with that. But seriously, why not follow the advice you were given from the beginning and invest in an eccentric hub or bb and just be done with all this foolishness of magic ratios, swapping cogs because your chain stretches, and buying cheap crappy chains for the rest of your life? It seems like you made this way more complicated than it should have been. Just my $0.02