Made some rope, adapted from a solidworks tutorial, which used sweep with a twist command.
In MoI, used sweep, then followed with twist command for 3 turns = 1080 degrees.
The outer cable of 6 ropes used the twist command again, with 1.5 turns = 540 degrees.
The second picture shows the result using the "surface" of the rope, without using all of the individual strands, which yielsd a smaller file size.
The two "starter" 3dm files just have two versions of the 2d profile, and path line.