ummm unscrewing the same way on both sides probably means french threaded? I'm really bad with threading, i get easily confused. If you ruined the BB, check the threads in the frame, you may have buggered them too! probably not, but check anyway.
The correct spindle length is dependent on the cranks AND the rear hub. Your best bet is the miche BB, which has cups that sit inside the frame meaning you get a few mil of play one way or another. I don't know if they come in french flavour though (but probably, considering they are french).
ummm unscrewing the same way on both sides probably means french threaded? I'm really bad with threading, i get easily confused. If you ruined the BB, check the threads in the frame, you may have buggered them too! probably not, but check anyway.
The correct spindle length is dependent on the cranks AND the rear hub. Your best bet is the miche BB, which has cups that sit inside the frame meaning you get a few mil of play one way or another. I don't know if they come in french flavour though (but probably, considering they are french).