After 40 years of Roto rounds I am using labella white tapes 105s on both fretless PJ basses and Chromes 100s on the fretted PJ. I am really digging both setups. I never thought I would like a non roundwound string. Now I don't see me going back. I also have a Set of Labella 105 flats on the Stingray tuned down to D that has a huge fat sound. I will keep the rounds on my Surfcaster, for nostalgia.