I've removed a lovely old, but now worn 7 speed sachs 'LY92' freewheel from a Campag Nuovo Tipo hub and had an el-cheapo Golden-Sun/Sun-Race/Sturmey Archer to put on. (It's for the pub bike with 126 dropouts.) Now the thread pitch seems identical (hub is ISO - 1.375 x 24tpi), but the freewheel...