1/4 Inch stainless steel cables will stay the mast so our dory can dance in a hurricane, if she wants to.
You cut em roughly to length. Then uncoil the wires by hand, inserting each filament deep under your fingernail until it really hurts.
Bend the filaments back and stuff the whole frayed mess upside-down through a bronze bell and fill the bell with liquid metal.
Then you'll want to obsessively re and re-measure the wire to get it the precise length for your mast. Repeat the whole torrid metal process on the other end and then stand there while Dad rigs it all up.