Buck Magnet! have you tried flipping your rest by hand to see if it's sticking or dragging a bit .What I have done to serve my string is to pull the string straight out to the inside of your down stroke cable pinch the string and slide your fingers up the cable and string, this gives you the slack that you need serve 1" above your pinch point ,this gives you an 1" of unserved string which gives you the slack that you need . I sure hope this help's this would be a lot easier if I could actually see how you have this set up .One Question......Have you been having contact all along or just recently ?

nubo