Threaded rod/long bolt, handful of washers and nuts.
Bolt will be preferable but threaded rod works the same.
Insert bolt/rod from NDS with a washer or two.
You'll need a long socket to hold the bolt/threaded rod with a nut. Tighten down from both sides.
Now put force from the NDS only, the bolt and nuts should tighten against the BB cup and loosen it.
If the nut moves, tighten more before repeating above!
Saving this to the list of lfgss wisdom, many thanks!
It's drive side if it's BSA though, never failed shall I say!
@Thrust started
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Threaded rod/long bolt, handful of washers and nuts.
Bolt will be preferable but threaded rod works the same.
Insert bolt/rod from NDS with a washer or two.
You'll need a long socket to hold the bolt/threaded rod with a nut. Tighten down from both sides.
Now put force from the NDS only, the bolt and nuts should tighten against the BB cup and loosen it.
If the nut moves, tighten more before repeating above!