The 100 pound kevlar probably would work just fine. If it is braided (and probably is) that could be a problem though if a few of the strands started wearing through. Why not save yourself the worry and pick up some extremely fine cable at the fishing department? They have the copper crimps right there to go with it too. Getting the length right is easy. Run the cable through the hole, back through the copper crimp tube, and clear through the tube again. The final length can be easily adjusted before crimping the tube.

Ernie