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@tbc
The Brompton is technically up and running, but still hasn't had the derailleur or hub gear cabled, so I have been riding it on something like 52x14 for a week. I think the pedals are about to snap off after every traffic light and hill.
Over the course of the afternoon I've hit a couple more snags with the Donouhue too.
Firstly, I went to chase and face it myself at my old workplace. The driveside threads don't go in far enough, and even with the chasing tool, it was impossible to get enough thread clear to face it properly, and the BB protrudes c.1mm, which I will need to fix with a spacer.
Then it turns out the Campag BB I bought the other week has the (correct) BSA thread drive-side, but the NDS cup is Italian threaded. D'oh. I fitted the Shimano BB-UN53 again as a stopgap until I can get the right cup.
Thirdly, one of the seat clamp 'ears' was bent and wouldn't admit the clamp bolt. This was relatively easily fixed by gently bending it with an 8mm hex key.
Finally, and what has made me give up for the day, is the fact that I still can't get a seatpost to comfortably fit. I can get one to go down about as far as the old seatpost was stuck, and then no further, apart from with huge resistance. Which is bad. I now have a theory has to what helped the old seatpost get stuck - I suspect the frame is made for a 27.0mm seatpost, and a 27.2mm post was forced in. Fingers crossed a 27.0mm seatpost, when I find one, will fit, otherwise I'm stuck again.
FML, and FTB.