I chickened out when I last took the B to a shop. I was pondering the acquisition of better lighting, in particular a better dynamo since the standard one is crap. But the price! I was thinking of getting a lightspin bottle dynamo, but it's very chunky and bottles are rather ugly. Maybe I should do the SON thing too, though the B goes in for special narrow components (drop-out width 90mm instead of 110mm).
I think I said this on IRC; but Schmidt have a prototype BromSON, but don't hold your breath. OTOH there are good cheap bottles out there - as good as bottles get, anyway.
Brompton lights
Re: Brompton lights