Thank you, Kohanmike! That’s very helpful. I had heard such good things about the round wound strings that I was kind of surprised that they seemed to rattle against the fretwires so much. I figured it was because I didn’t know how to play and had no technique (and that probably contributed a lot to the problem), but still, it seemed like a glaring issue. I’ll contact Kala regarding the possible need to swap the nut. If I do switch to the Pahoehoe strings, will there still be some fret rattle, do you think? Would I be better off with a fretless u-bass? Thanks again!