Originally Posted by
badmother
This is not something I would do. Makes me cringe just reading about it.
my B is older just like yours so I am sorry I can not help you with the info you need.
No worries, man. After sleeping on it, have decided to try the Shimano derailleur idea and if that doesn't work then I will buy a new, complete frame next time I'm in the UK.
Meanwhile, I'll live with a slightly odd three-speed with a *very* wide gear range.
cheers
Paul