For my STRyan I used some banning that is used in a staple machine This way I coule sodder clevises on one end and a threaded sleave on the other that way you could adjust to tighten to what what ever degree you could want. Plus you could paint them to match the plane. They looked quite well and a lot of people asked where I got the flying wires for that plane. Before I tried Elastic cord but it would get fuel soaked and stretch.