kevlar is volnerable in transport of a crouded car, in the rigging, and can be freyed due to hangar rash, Also, you need to be a Boy scout or the knot may be an issue.
fishing wire eliminates all the above concerns.
I brought some 30 lb test nylon coated wire to a club meeting and looped it. I dared the members to break it and no one could.
one guy even put a pen on each end to use a pulling device. the pen gave before the line.
real simple twist two or three times and melt on low heat untill you see the coating become one. that's it!!! it stretches a little over time but when you rig the first time you leave room for correcting that in the linkage.

Oh,,,One more thing. in a full bore impact ( tested many times !!) the pull pull lines always remain intact.