Originally Posted by
Chombi
I wonder if you can drill a small hole at the fixed cup flange (if it has enough material sticking out past the BB shell) and safety wire the thing to the chain stay near it so it does not loosen up.......
A better idea would be to drill and tap the BB shell for a set screw to bear against the fixed cup's threads. But if you can get the cup tight enough in the first place, further measures shouldn't be necessary.