Long shot, but I don't suppose you know what weight you got it down to in the end?
Not very light, still had the sturmey 3 speed etc. Look on the Raleigh twenty forum a guy built a carbon road one.
@hugo7 started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
Long shot, but I don't suppose you know what weight you got it down to in the end?