CAD package for wiring diagrams

[eSteve]

Thanks for your replies.

Yes, tex, sometimes using something simple is the best idea.

I did in the end find some software called ProfiCAD (free for non-commercial use) which was the sort of thing I was after. See: http://www.proficad.com/

There is a motor cycle wiring diagram in their gallery which has a lot of symbols on it appropriate for the Roadster.

But for now will study the Westfield diagram, and actually make some progress on the chassis.