I just wire wrap my handle cables, much like flying lines, but I do solder them, then heat shrink tubing over them. I wouldn't solder flying lines but don't see the problem with handle cable. Makes the ends much smaller and less prone to the potential for hanging up on each other. Another way to do that is to not make the cable too long. I buy bicycle control cable or what the call "aircraft control cable" at the hardware store, 1/16" diameter, Inspect it often and change if there is ever a question. Of course, hard point handles remove this all from the equation.
Type at you later,
Dan McEntee