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You might need a 73mm "mountain" BB, rather than road. In that case you'll want 2x2.5mm on DS, 1X2.5 on NDS. Hope's doc covers variations: https://www.hopetech.com/_repository/1/documents/BSA_threaded_WEB_2023.pdf
atk
Browndonneur
Yup, though looks like I may need to space out the 68mm BB? I now realise the photos taken last night didn’t have the lockring flush with the BB (despite the DS crank bolt being tightened all the way).
This morning, I moved the DS assembly in by force of hand to take up the slack (the lock ring is now flush with the BB) but that’s meant the NDS assembly is now jutting right out and the lockring, even when wound all the way inwards, runs out of threads.
In the circumstance, is it normal to space out a 68mm BB to 73mm by 2x 2.5mm spacers, one on each side?