Aerospace Composite sells a nylon coated kevlar called KevCord. They also sell these 4-40 bolts with a hole in the middle. On the surface end use the bolt and simply knot the kevcord and pull tight. On the servo end use a sullivan 4-40 eyelet, but make sure it is smooth (no burs). Knot the kevcord and put a drop of CA on it. Great system.

Craig.