Re:
With apologies, I seem to have missed some responses on this thread.
History Man, I've tried to catch the geometry in a photo - I think you might be working on a Clockwork now?
Thanks all for convincing me to go with white cables; I received gear and brake outers through the post this week - not cheap but an eBay lot bundled with some Euclid thumbies, which I can either sell or keep for another build. I really like the colour of the cable, which compliments the metallic white of the frame nicely.
I'm currently experimenting with a couple of luminous yellow touch ups, with different primers, to get the best colour match.
Hope to make real progress over the next few weeks.