I would not trust any cables that cross each other if they make contact where they cross. Sooner or later one will saw the other into two pieces. I prefer the nylon coated fish line leader also. I have quite a few 1/4 scale with pull-pull on rudder and elevator, some over 12 years old with hundreds of flights and no failures. I do run the cables inside nylon tubes (to more easily string the lines and to guide the lines around some rather sharp turns. I do use a pulley at the servo end, no bell cranks, as the pulley always pays out as much line as it pulls in with no tension changes. Lines just taunt enough to not come off pulley.