gareth wrote:
With one of my other hats on, that of a model railway enthusiast, it struck
me
that the packs of flexible track supplied for gauges N, OO, O and 1 would
make
nice rigid balanced feeders.

Steel, ties likely not UV resistant, cost per unit length, marginal
connections between sections.

Brazing rod is much cheaper for sections up to a few meters.

--
Jim Pennino