I have picked up some D'Addario Pro Arte Classical strings EJ46 Hard tension. These are the same that I have on my Ovation. As they are strings without a ball end the sugestion was that I tie a knot at the end and slip a small bead down the string to the knot then use as a ball end string. Hope that this works As last resort I could go to silk and steel. It's the wound ones appear to be giving me the problem.. I believe someone also makes an extra Hard nylon set. Will have to try those also if I can fing out who makes them.. Allan