"Ian White" wrote in message
...
....
The number of separate lengths of wires involved - approaching 200 - means
I have to think about easy "mass production" techniques. Many of the
things you wouldn't hesitate to do for a few tens of metres are simply not
on at the kilometre scale. Wire's too long; life's too short....

A wire company e.g.

http://www.knight-precision-wire.co.uk/

or Ormiston Wire (who don't seem to have a web site) will sell you the wire
cut to length and straightened. Even if you want to do the work yourself,
that will still probably be the cheapest sort of place to buy from.

Colin Bignell