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@Ph1ll1p
Arse bracket wise, I have found this: https://www.sjscycles.co.uk/bottom-brackets/yst-bb0901-threadless-external-bottom-bracket-68mm-black/
Which after emailing SJS, they informed me it doesn't work with road cranksets as it's too wide, which leaves me with three choices.
Mod the frame. Already doing this else where, but it will mean I'm stuck with this BB for life (or at least this brand). Not totally a bad thing.
Mod the bb. Prefer this option, but it will depend on how much material I have to remove.
My plan is to measure the bb on my other bike that works with the cranks I want to use, then use that as my max limit. I reckon I'll have to skim about 2mm of material off something, so we will see when I get around to ordering it.
Necular option is make my own pressfit BB. I like this idea the most, the BB shell is well within bb30 tolerances, but upsettingly not diameter) so making something would be easy, it's more if I have to replace it, I would have to make another. That being said, now that I have typed it, it does seem fun.