"I've been using D'Addario Stainless Steel for 40 years almost and they're just perfect!" Great tone that doesn't fade for what seems like forever!!! PRODUCTS USED Electric Guitar EPS 510 Regular Light 10-46 EPS 520 Super Light 9-42 ECG23 Chromes Extra Light 10-48 Flat wound Acoustic Guitar EJ15 Extra Light 10-47 (Frank replaces the wound 3rd string for a 0.18 plain steel string) EJ34 Folk Nylon black top strings and all ball end