Don's hobby sells a coated kevlar set up...that's totally non-conductive and stronger then steel it seems. I'm thinkning it runs around $15 or so for enough to equip a giant-scale. I know I did a 27% plane, and had ample left.
I bought more to do the flying wires too. The crimps shown here are nothing more then aluminum tubing crimped with electricians plyers. I'm going to show the flying wire set-up here. The pull pull is identical except the pull pull hardware is 4-40, the flying wires shown are 2-56. The cabling is same for both though.
I'm secure knowing there's absolutely no metallic anything in the whole set up, and what I hear is it's lighter and stronger then steel.