Hello & thanks for taking the time to answer my questions. I've recently switched from guitar to bass, and I'm really enjoying it. I have a couple of questions. I like a more rich, mellow tone. A friend suggested flat wound strings. What do you think? I was also told that the "Beatle bass" should have lighter gauge strings to avoid damaging the neck. Is that true? Lastly, my bass is missing the truss rod cover. I've looked everywhere I could think of on line, but can't find one. Suggestions?