[PeterL]

I'm a big fan of rolled wire, transformer wire or fuse wire of varying thicknesses for different jobs, and I agree it's difficult to keep it straight. Annealing in a candle flame helps.

Speaking of candle flames, stretched sprue is worth persevering with IMO. If not for rigging then for other applications. For 1/72 I would recommend clear sprue. It is less flexible, which helps to keep it straight, and , because it is only visible where the light strikes it, appears thinner than it actually is. If you stretch some of the T-section clear plastic from the upright of an old Airfix kit stand (never throw anything away), the same property creates the illusion of two parallel wires so that double flying wires can be represented. Tiny blobs of Krystal Klear will fix it in place. But, whatever you do, do not spray a model rigged in this way with any kind of varnish once the rigging is complete. It will ruin the effect.

Sprue is also good for details such as springs (perhaps not in 1/72) ,fuel lines, control runs etc. It must first be softened if it is to be worked into tight bends. This can be done either by immersing it in hot water, or by spraying with some kind of solvent such as an aerosol laquer.