I have an old steal racer that has a BB with 2 adjustable cups and two lock rings. In other words it does not have the traditional fixed cup and adjustable cup, both sided thread in to where you want the chainline to be, and then you tighten up both lock rings.
The BB shell is Italian Threading, so that the drive side has a right-hand thread. Sheldon Brown and others have identified this as being a poor engineering idea since right-hand threading has a tendency to unthread under force-which has happened to me about five times.
The BB is a sealed cartridge and the cups sleeve over it on both ends.
My idea is to put the BB on my other touring bike that has English thread, and:
1- Get either adustable cups for left and right again, the idea being that the drive side would be left-threaded and not be prone to undoing, or;
2-Get an adjustable and fixed cup to sleeve over the cartridge in English threading.
Will either of these solutions work or be worth it?